TWI613914B - Audio and video transmission system and audio and video receiving system - Google Patents

Abstract

An audio-visual transmission system and an audio-visual receiving system, the audio-visual transmission system includes an image signal transmission circuit and an audio signal transmission circuit, and the image signal transmission circuit is configured to receive a plurality of image signals and generate image optical signals, and the sound signal transmission circuit is configured to receive more Sound signals and sound signals are generated according to the sound. The video receiving system includes an image signal receiving circuit and an audio signal receiving circuit. The image signal receiving circuit is configured to sense a plurality of image light signals and output a plurality of sensing image signals, and the sound signal receiving circuit is configured to sense the plurality of sound light signals and output the plurality of sensing sound signals. Therefore, wireless data transmission can be realized by optical signals through the audio-visual transmission system and the audio-visual receiving system.

Description

Video transmission system and its audio receiving system

The invention provides an audio-visual transmission system and an audio-visual receiving system thereof, in particular to an audio-visual transmission system and an audio-visual receiving system thereof.

Conventional optical communication usually uses optical fiber as the transmission medium, but the optical fiber is a physical circuit, and has many limitations in installation and configuration, such as the way, location or distance of the wiring, etc., all of which affect the quality of optical communication. In addition, the physical line requires additional cost, resulting in additional user spending and configuration inconvenience.

In order to solve the above drawbacks, the present invention provides a video transmission system that receives a plurality of video signals and a plurality of audio signals. The video transmission system further includes an image signal transmission circuit and an audio signal transmission circuit. The image signal transmission circuit is configured to receive the plurality of image signals, and the image signal transmission circuit comprises an image filtering unit, an image signal processing unit, a buffer unit, an image synchronization unit, a first light emitting diode element, and a diode control unit. The image filtering unit is configured to receive the plurality of image signals, and the image signal processing unit is electrically coupled to the filtering unit. The image signal processing unit is configured to convert the plurality of image signals into a plurality of output image signals, the buffer unit and the image. The signal processing unit is electrically coupled to the image signal processing unit for receiving the plurality of output image electrical signals, and the first LED component is electrically coupled to the image synchronization unit. The diode control unit is electrically coupled to the first LED component. The sound signal transmitting circuit is configured to receive the plurality of sound signals, and the sound signal transmitting circuit comprises a sound filtering unit, an audio signal processing unit, a sound synchronization unit, a resonance unit, and a second light emitting diode element. The sound filtering unit is configured to receive the plurality of sound signals, the sound signal processing unit is electrically coupled to the sound filtering unit, and the sound signal processing unit is configured to convert the plurality of sound signals into a plurality of output sound signals, and the sound synchronization unit The sound signal processing unit is electrically coupled to receive the output sound signal, the resonant unit is electrically coupled to the sound synchronization unit, and the second light emitting diode element is electrically coupled to the sound synchronization unit and the resonant unit. .

The invention further provides an audio-visual receiving system corresponding to the audio-visual transmission system, and the audio-visual receiving system comprises an image signal receiving circuit and an audio signal receiving circuit. The image signal receiving circuit includes a first light detecting component, a first filtering unit, an image receiving synchronization unit, and an image amplifying unit. The first light detecting component is configured to sense the plurality of image light signals and output the plurality of sensing image signals, the first filtering unit is electrically coupled to the light detecting component, and the image receiving synchronization unit is electrically coupled to the light detecting component. The image amplifying unit is electrically coupled to the image receiving synchronization unit for outputting a plurality of image signals. The sound signal receiving circuit includes a second light detecting component, a second filtering unit, a third filtering unit, and a sound amplifying unit. The second light detecting component is configured to sense a plurality of sound optical signals and output a plurality of sensing sound signals. The second filtering unit is electrically coupled to the second optical detecting component, the third optical detecting component is electrically coupled to receive the plurality of sensing sound signals, and the sound amplifying unit is electrically coupled to the third filtering unit. The sound amplifying unit is configured to output a plurality of sound signals.

Since the audio-visual transmission system and the audio-visual receiving system of the present invention transmit video and audio signals through the light wave, no additional physical lines are needed, and the cost is effectively reduced. In addition, the audio-visual transmission system and the audio-visual receiving system of the present invention can be freely configured according to requirements. There is no need to consider the configuration of the physical line or the signal transmission distance, which increases the convenience of use.

The above and other objects, features, and advantages of the present invention will become more apparent from the description of the appended claims.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of an embodiment of an audio-visual transmission system and an audio-video receiving system thereof. The audio-visual transmission system 10 is electrically coupled to an electronic device 30, such as a DVD player. The electronic device 30 transmits the plurality of video signals and the plurality of audio signals to be played to the audio-visual transmission system 10, and the video transmission system 10 and the video signal transmission circuit 11 The audio signal transmitting circuit 12 converts the received plurality of video signals and the plurality of audio signals into optical signals and transmits them through the air. The video receiving system 20 is electrically coupled to a display electronic device 40. The video receiving system 20 is configured to receive the optical signal transmitted by the video transmission system 10 via the air through the video signal receiving circuit 21 and the audio signal receiving circuit 22, and receive the optical signal. The optical signal is converted into a plurality of video signals and audio signals that can be played. The display electronic device 40 is, for example, a display screen. The display electronic device 40 is configured to receive a plurality of image signals and audio signals output by the video receiving system 20, and play the received plurality of video signals and audio signals. In some embodiments, the AV delivery system 10 and its AV receiving system 20 can be configured in an indoor space, such as a classroom.

The video transmission system 10 further includes an image signal transmission circuit 11 and an audio signal transmission circuit 12. Please refer to FIG. 2. FIG. 2 is a schematic diagram of an embodiment of the image signal transmitting circuit 11. The image signal transmission circuit 11 includes an image filtering unit 111, an image signal processing unit 112, an image synchronization unit 113, a first light emitting diode element 114, a diode control unit 115, and a buffer unit 116. The image filtering unit 111 includes a capacitor C1, a capacitor C2, a capacitor C3, a resistor R1, and a resistor R2. The capacitor C1 has a first end and a second end. The first end of the capacitor C1 is electrically coupled to the electronic device 30 of FIG. Receiving the plurality of image signals described above, the size of the capacitor C1 is, for example, 4.7 u Farad. The capacitor C2 has a first end and a second end. The first end of the capacitor C2 receives the image signal, and the size of the capacitor C2 is, for example, 0.1 ufarad. The resistor R1 has a first end and a second end. The first end of the resistor R1 is electrically coupled to the first end of the capacitor C1 and the first end of the capacitor C2, and the second end of the resistor R1 is electrically connected to the low voltage level GND. The low voltage level GND is, for example, grounded, and the size of the resistor R1 is, for example, 91 ohms. The resistor R2 has a first end and a second end, the first end of the resistor R2 is electrically coupled to the second end of the capacitor C2, and the second end of the resistor R2 is electrically coupled to the low voltage level GND, and the size of the resistor R2 For example, it is 1K ohm. The capacitor C3 has a first end and a second end. The first end of the capacitor C3 is electrically coupled to the second end of the resistor R1 and the second end of the resistor R2, and the second end of the capacitor C3 is electrically connected to the low voltage level GND. The image filter unit 111 is configured to filter the received plurality of image signals.

The image signal processing unit 112 is electrically coupled to the image filtering unit 111 and receives the high voltage level V1 as the driving voltage. The image signal processing unit 112 is configured to receive the plurality of filtered image signals, and the image signals will be The image signal processing unit 112 is converted into a plurality of output image signals for transmission, and the image signal processing unit 112 is, for example, an image processing chip. The image synchronizing unit 113 includes a resistor R3, a resistor R4, a capacitor C4, and a capacitor C5. The resistor R3 has a first end and a second end. The first end of the resistor R3 is configured to receive a high voltage level V1. The high voltage level V1. For example, the driving voltage of the image signal processing unit 112, the second end of the resistor R3 is electrically coupled to the image signal processing unit 112 for receiving the plurality of output image electrical signals, and the resistor R3 is, for example, a 500 ohm variable resistor. The size can be adjusted according to the use environment and circuit requirements. The resistor R4 has a first end and a second end. The first end of the resistor R4 is electrically coupled to the second end of the resistor R3. The resistor R4 is, for example, 1K ohm. The capacitor C4 has a first end and a second end, the first end of the capacitor C4 is electrically coupled to the second end of the resistor R4, and the second end of the capacitor C4 is electrically coupled to the low voltage level GND, and the capacitor C4 The size is, for example, 4.7 u Farah. The capacitor C5 has a first end and a second end. The first end of the capacitor C5 is electrically coupled to a high voltage level V2. The high voltage level V2 is, for example, a driving voltage of the buffer unit 116, and the second end of the capacitor C5. It is electrically coupled to the low voltage level GND described above, and the size of the capacitor C5 is, for example, 0.1 u Farad. In other embodiments, a resistor R5 is electrically coupled between the image signal processing unit 112 and the image synchronization unit 113. The resistor R5 has a first end and a second end, and the first end of the resistor R5 and the image signal processing unit The second end of the resistor R5 is electrically coupled to the second end of the resistor R3. The size of the resistor R5 is 22 ohms. The image synchronizing unit 113 is configured to adjust the image signal to correspond to the corresponding sound. The electrical signal can be played simultaneously. In other embodiments, a capacitor C6 is electrically coupled between the image signal processing unit 112 and the image synchronization unit 113. The capacitor C6 has a first end and a second end, and the first end of the capacitor C6 and the image signal processing unit The first end of the resistor C3 is electrically coupled to the first end of the resistor R3. The second end of the resistor C6 is electrically coupled to the low voltage level GND. The size of the capacitor C6 is, for example, 0.1 ufarad.

The first light-emitting diode element 114 may be a laser diode, because the characteristics of the laser light are high monochromaticity, good directivity, high homology and high power, and the luminous efficiency of the light-emitting diode is low, and the coupling is low. The efficiency of the input fiber is low, and the light source is not a single wavelength, that is, the line spectrum is wide, and the transmission capacity is larger, so it is suitable for transmitting video and audio signals. The diode control unit 115 includes a resistor R6, a transistor T1, a diode D1, and a diode D2. The resistor R6 has a first end and a second end, and the first end of the resistor R6 receives the high voltage level V1, and the size of the resistor R6 is, for example, 8.2K ohms. The transistor T1 has a first end, a second end, and a control end. The control end of the transistor T1 is electrically coupled to the second end of the resistor R6. The first end of the transistor T1 and the first LED component 114 are electrically coupled. The negative terminal is electrically coupled, and the second end of the transistor T1 is electrically coupled to the low voltage level. The diode D1 has a first end and a second end. The first end of the diode D1 is electrically coupled to the control end of the transistor T1. The diode D2 has a first end and a second end. The first end of the diode D2 is electrically coupled to the second end of the diode D1, and the second end of the diode D2 is electrically connected to the low voltage level. The diode control unit 115 is configured to maintain the voltage of the control terminal of the transistor T1 by the voltage across the diode D1 and the diode D2, so that the transistor T1 is kept turned on, thereby maintaining the first LED. The second end of the component 114 remains open, allowing the first LED component 114 to normally generate an optical signal. In addition, when the high voltage level V1 is unstable, the effect of protecting the first light emitting diode element 114 can be achieved by turning off the transistor T1. The buffer unit 116 can be a follower. The buffer unit 116 is configured to receive the high voltage level V2 and the low voltage level GND. The buffer unit 116 includes a first input end, a second input end, and an output end. The buffer unit 116 The first input end is electrically coupled to the first end of the capacitor C4, the second input end of the buffer unit 116 is electrically coupled to the output end, and the output end of the buffer unit 116 is electrically coupled to the first end of the capacitor C3. .

Therefore, after the image signal transmitting circuit 11 receives the plurality of image signals transmitted by the electronic device 30, the image filtering unit 111 filters the received plurality of image signals, and the image signal processing unit 112 converts the received plurality of filtered image signals. For outputting a plurality of output image signals, the output image signal is adjusted by the image synchronization unit 113 so that the image signal included in the output image signal can be synchronized with the sound signal and output to the first LED component 114. At the positive terminal, the first LED component 114 generates an image optical signal according to the corresponding output image current of the synchronized output image signal.

Please refer to FIG. 3. FIG. 3 is a schematic diagram of an embodiment of an audio signal transmission circuit 12. The audio signal transmission circuit 12 includes a sound filtering unit 121, an audio signal processing unit 122, a sound synchronization unit 123, a resonance unit 124, and a second LED component. 125. The sound filtering unit 121 includes a capacitor C7 and a resistor R7. The capacitor C7 has a first end and a second end. The first end of the capacitor C7 is configured to receive the plurality of sound signals, and the second end of the capacitor C7 is used to output the filtered For a plurality of sound signals, the size of the capacitor C7 is, for example, 2.1 u Farad. The resistor R7 has a first end and a second end, the first end of the resistor R7 is electrically coupled to the second end of the capacitor C7, and the second end of the resistor R7 is electrically coupled to the low voltage level GND, and the low voltage level is GND is, for example, grounded, and resistor R7 is, for example, a 100K variable resistor. The size of resistor R7 can be adjusted according to the operating environment and requirements. The sound signal processing unit 122 is electrically coupled to the sound filtering unit 121. The sound signal processing unit 122 is configured to receive the filtered plurality of sound signals, and convert the plurality of sound signals into a plurality of output sound signals, and the sound signal processing Unit 122 is, for example, an audio signal processing chip.

The sound synchronization unit 123 includes a resistor R8, a resistor R9, a resistor R10, a capacitor C8, and a capacitor C9. The resistor R8 has a first end and a second end. The first end of the resistor R8 is electrically coupled to the audio signal processing unit 122 and receives a plurality of output audio signals. The size of the resistor R8 is, for example, 2.7 ohms. The capacitor C8 has a first end and a second end, the first end of the capacitor C8 is electrically coupled to the second end of the resistor R8, and the second end of the capacitor C8 is electrically coupled to the low voltage level GND, and the size of the capacitor C8 For example, 47 u Farah. The capacitor C9 has a first end and a second end. The first end of the capacitor C9 is electrically coupled to the first end of the resistor R8, and the second end of the capacitor C9 is electrically coupled to the negative end of the second LED component 125. The size of the capacitor C9 is, for example, 470 u Farad. The resistor R9 has a first end and a second end. The first end of the resistor R9 is electrically coupled to the second end of the capacitor C9. The resistor R9 is, for example, a 2K variable resistor. The size of the resistor R9 can be adjusted according to the operating environment and requirements. The resistor R10 has a first end and a second end. The first end of the resistor R10 is electrically coupled to the second end of the resistor R9, and the second end of the resistor R10 is electrically coupled to the low voltage level GND. In some embodiments, the sound synchronization unit 123 can be adjusted according to the image light signal transmitted by the image signal transmission circuit 11 for the first time, so that the sound light signal can be synchronized with the image light signal.

The resonant unit 124 includes an inductive component L1, a capacitor C10, a capacitor C11, a capacitor C12, and a capacitor C13. The inductor element L1 has a first end and a second end. The first end of the inductor element L1 is electrically coupled to the positive end of the second LED component 125. The second end of the inductor element L1 is electrically connected to the high voltage level V3. For example, the high voltage level V3 can be the driving voltage of the sound signal processing unit 122, and the size of the inductance element L1 is, for example, 4.7 u Henry. The capacitor C10 has a first end and a second end. The first end of the capacitor C10 is electrically coupled to the first end of the inductor element L1, and the second end of the capacitor C10 is electrically coupled to the low voltage level GND. The size is, for example, 0.1 u farad. The capacitor C11 has a first end and a second end. The first end of the capacitor C11 is electrically coupled to the second end of the inductor element L1, and the second end of the capacitor C11 is electrically coupled to the low voltage level GND. The size is, for example, 0.01 u Farah. The capacitor C12 has a first end and a second end. The first end of the capacitor C12 is electrically coupled to the second end of the inductor element L1, and the second end of the capacitor C12 is electrically coupled to the low voltage level GND. The size is, for example, 0.1 u farad. The capacitor C13 has a first end and a second end. The first end of the capacitor C13 is electrically coupled to the second end of the inductor element L1, and the second end of the capacitor C13 is electrically coupled to the low voltage level. The size of the capacitor C13 For example, 100 u Farad, the resonant unit 124 is used to generate a sine wave signal.

Therefore, after the audio signal transmitting circuit 12 receives the plurality of audio signals transmitted by the electronic device 30, the filtering unit 121 filters the plurality of audio signals, and the filtered plurality of audio signals are transmitted to the audio signal processing unit 122, and the audio signal processing is performed. The unit 122 outputs a plurality of output sound signals according to the sound, and the sound synchronizing unit 123 synchronizes the received output sound signals, and the second light emitting diode element 125 is coupled to the resonant unit 124 and the synchronized output sound signals. The resulting corresponding output sound current illuminates to produce a sound light signal.

The aforementioned video receiving system 20 further includes an image signal receiving circuit 21 and an audio signal receiving circuit 22. Please refer to FIG. 4 . FIG. 4 is a schematic diagram of an embodiment of the image signal receiving circuit 21 . The image signal receiving circuit 21 includes a first light detecting component 211 , a filtering unit 212 , a image receiving synchronization unit 213 , and an image amplifying unit 214 . The first photodetecting element 211 has a positive terminal and a negative terminal. The positive terminal is electrically coupled to the image receiving synchronization unit 213, the negative terminal is electrically coupled to the filtering unit 212, and the first photo detecting component 211 is, for example, a PIN. The first photodetecting element 211 is configured to sense the optical signal and output a plurality of sensing image signals, such as sensing current. The filter unit 212 includes a capacitor C21, a capacitor C22, and a capacitor C23. The capacitor C21 has a first end and a second end. The first end of the capacitor C21 is electrically coupled to the negative end of the first photodetecting element 211, and the capacitor C21 is The two ends are electrically coupled to the low voltage level GND. The low voltage level GND is, for example, ground. The size of the capacitor C21 is, for example, 0.1 ufarad. The capacitor C22 has a first end and a second end. The first end of the capacitor C22 is electrically coupled to the negative end of the first photodetecting element 211, and the second end of the capacitor C22 is electrically coupled to the low voltage level GND. The capacitor C22 is, for example, 0.01 u farad. The capacitor C23 has a first end and a second end. The first end of the capacitor C23 is electrically coupled to the negative end of the first photodetecting element 211, and the second end of the capacitor C23 is electrically coupled to the low voltage level GND. The size of the capacitor C23 is, for example, 0.1 u farad. In some embodiments, the number of capacitors of the filtering unit 212 can be adjusted according to requirements. In the embodiment, the filtering unit 212 includes three capacitors: capacitor C21, capacitor C22, and capacitor C23, but is not limited thereto.

The image receiving synchronization unit 213 includes a resistor R21, a resistor R22, a resistor R23, and a capacitor C24. The resistor R21 has a first end and a second end. The first end of the resistor R21 is electrically coupled to the positive end of the first photodetecting element 211 for receiving the plurality of sensing image signals, and the R21 is, for example, 10K variable. The resistance, the size of which can be adjusted according to the operating environment and needs. The resistor R22 has a first end and a second end. The first end of the resistor R22 is electrically coupled to the first end of the resistor R21. The second end of the resistor R22 is electrically coupled to the low voltage level GND. 10K resistor. The resistor R23 has a first end and a second end. The first end of the resistor R23 is electrically coupled to the first end of the resistor R21. The second end of the resistor R23 is electrically coupled to the low voltage level GND. The capacitor C24 has a first end and a second end. The first end of the capacitor C24 is electrically coupled to the positive end of the first photodetecting element 211, and the second end of the capacitor C24 is electrically coupled to the image amplifying unit 214. To output the synchronized or delayed sensed video signal to the image amplifying unit 214, the capacitor C24 is, for example, 0.1 u Farad, and the image receiving and synchronizing unit 213 is configured to adjust the received sensing image signal so that the sensing image signal can correspond to Sensing the sound signal synchronization.

The image amplifying unit 214 is, for example, a differential amplifier having a first input end, a second output end, and an output end. The first input end is electrically coupled to the low voltage level GND, and the second input end is coupled to the second input end. The second end of the capacitor C24 is electrically coupled to receive the synchronized sensing image signal. The output of the image amplifying unit 214 is used to amplify the received sensing image signal and output a plurality of image signals for playing. The resistor R24 is further disposed between the first input end and the low voltage level GND. The resistor R24 is electrically coupled between the first input end and the low voltage level GND. The resistor R24 is, for example, 2.2. K resistance. The image amplifying unit 214 is further configured to receive a first driving voltage V4 and a second driving voltage V5. The first driving voltage V4 is different from the second driving voltage V5. The first driving voltage V4 is, for example, 5 volts, and the second driving voltage is V5 is, for example, -5 volts. The image amplifying unit 214 further includes a capacitor C25 and a capacitor C25. The capacitor C25 has a first end and a second end. The first end of the capacitor C25 is electrically coupled to the image amplifying unit 214 and the first driving voltage V4, and the second capacitor C25. The terminal is electrically coupled to the low voltage level GND. The capacitor C25 is, for example, a 0.1 uF capacitor. The capacitor C26 has a first end and a second end. The first end of the capacitor C26 and the image amplifying unit 214 and the second driving voltage V5 are electrically connected. The second end of the capacitor C26 is electrically coupled to the low voltage level GND, and the capacitor C26 is, for example, a 0.1 uF capacitor.

Therefore, the image signal receiving circuit 21 senses the image light signal corresponding to the output image signal by the first light detecting component 211, and accordingly generates a corresponding plurality of sensing image signals, and the image receiving synchronization unit 213 performs the sensing image signal. After the synchronization, the synchronized image signal is amplified by the image amplifying unit 214 and output as an image signal for playing, and the image signal is transmitted to the display electronic device 40 for playing.

Please refer to FIG. 5. FIG. 5 is a schematic diagram of an embodiment of the audio signal receiving circuit 22. The audio signal receiving circuit 22 includes a second light detecting component 221, a filtering unit 222, a filtering unit 223, and a sound amplifying unit 224. The second photodetecting element 221 has a positive terminal and a negative terminal. The positive terminal of the second photo detecting component 221 is electrically coupled to a high voltage level V6. The high voltage level V6 can be the first driving of the sound amplifying unit 224. The second photodetecting element 221 is electrically coupled to the filtering unit 223, the second photo detecting component 221 is a PIN detecting diode, and the second photo detecting component 221 is configured to sense a plurality of sound optical signals. And outputting a plurality of sensing sound signals, for example, outputting a sensing current. The filter unit 222 includes a capacitor C27, a capacitor C28, and a capacitor C29. The capacitor C27 has a first end and a second end. The first end of the capacitor C27 is electrically coupled to the positive terminal of the second photodetecting component 221, and the capacitor C27 is The second end is electrically coupled to the low voltage level GND, and the low voltage level GND is, for example, grounded. The capacitor C28 has a first end and a second end. The first end of the capacitor C28 is electrically coupled to the positive end of the second photodetecting element 221, and the second end of the capacitor C28 is electrically coupled to the low voltage level GND. The capacitor C28 is, for example, 0.1 u farad. The capacitor C29 has a first end and a second end. The first end of the capacitor C29 is electrically coupled to the positive end of the second photodetecting element 221, and the second end of the capacitor C29 is electrically coupled to the low voltage level GND. The capacitor C29 is, for example, 0.01 u farad. In some embodiments, the number of capacitors of the filtering unit 222 can be adjusted according to requirements. In the embodiment, the filtering unit 222 includes three capacitors: capacitor C27, capacitor C28, and capacitor C29, but is not limited thereto.

The filter unit 223 includes a resistor R25, a resistor R26, and a capacitor C30. The resistor R25 has a first end and a second end. The first end of the resistor R25 is electrically coupled to the negative terminal of the second photodetecting component 221, and the resistor R25 is The second end is electrically coupled to the low voltage level GND. The low voltage level is, for example, ground. The resistor R25 is, for example, 1K ohm. The capacitor C30 has a first end and a second end. The first end of the capacitor C30 is electrically coupled to the negative end of the second photodetecting element 221, and the capacitor C30 is, for example, 0.1 u farad. The resistor R26 has a first end and a second end. The first end of the resistor R26 is electrically coupled to the second end of the capacitor C30, and the second end of the resistor R26 is electrically coupled to the sound amplifying unit 224. It is a 10K resistor, wherein the resistor R26 is for outputting the filtered plurality of sensing sound signals. The sound amplifying unit 224 has a first input end, a second input end and an output end. The first input end of the sound amplifying unit 224 is electrically coupled to the low voltage level GND, and the sound amplifying unit 224 is The second input end is electrically coupled to the second end of the resistor R26, and receives the filtered plurality of sensed sound signals, and the output end of the sound amplifying unit 224 is configured to output the amplified sound signal to A sound output device, such as the sound emitting element of the aforementioned display electronic device 40. In some embodiments, the audio signal receiving circuit 22 further includes a resistor R27. The resistor R27 has a first end and a second end. The first end of the resistor R27 is electrically coupled to the second input end of the sound amplifying unit 224. The second end of the resistor R27 is electrically coupled to the output end of the sound amplifying unit 224. The resistor R27 is, for example, a 100K resistor. The sound signal receiving circuit 22 further includes a capacitor C31 having a first end and a second end. The first end of the capacitor C31 is electrically coupled to the output end of the sound amplifying unit 224, and the second end of the capacitor C31. For outputting an audio signal, the capacitor C31 is, for example, 0.1 u Farad.

Therefore, after the second light detecting component 221 of the sound signal receiving circuit 22 generates the sensing sound signal by sensing the sound light signal, the filtering unit 223 filters the sensing sound signal, and the filtered sensing sound signal is transmitted. The sound amplification unit 224 performs amplification, and the output audio signal is transmitted to the electronic device 40 for broadcast.

In summary, the audio-visual transmission system 10 of the present invention can transmit a plurality of video signals and a plurality of audio signals by optical signals through the first LED component 114 and the second LED component 125. The system 20 senses the image light signal and the sound light signal by the first light detecting component 211 and the second light detecting component 221, and the video receiving system 20 converts the sensed plurality of sensing image signals and the sensing sound signals into The image signal and the sound signal for playing, and the image signal and the sound signal are transmitted to the display electronic device 40, so that the display electronic device 40 can play the image signal and the sound signal. Therefore, with the audio-visual transmission system 10 and the video-audio receiving system 20 of the present invention, signal transmission can be performed without using a physical line, thereby effectively reducing the cost of the physical circuit. Further, since the present invention transmits data by optical signals. Moreover, there is no need to additionally apply for spectrum use, and since the video transmission system 10 and the video receiving system 20 of the present invention have no physical line, the audio-visual transmission system 10 and the audio-video receiving system 20 of the present invention need not be considered when considering the line distance or The location makes it easier to configure the system and improve the convenience of use.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Any one skilled in the art can make some modifications and retouchings without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

10‧‧‧Video Transmission System

11‧‧‧Image signal transmission circuit

111‧‧‧Image Filtering Unit

112‧‧‧Image Signal Processing Unit

113‧‧‧Image Synchronization Unit

114‧‧‧First LED component

115‧‧‧Diode Control Unit

116‧‧‧buffer unit

12‧‧‧Sound signal transmission circuit

121‧‧‧Sound Filter Unit

122‧‧‧Sound signal processing unit

123‧‧‧Sound synchronization unit

124‧‧‧Resonance unit

125‧‧‧Second light-emitting diode element

20‧‧‧Video Receiving System

21‧‧‧Image signal receiving circuit

211‧‧‧First light detecting element

212‧‧‧Filter unit

213‧‧‧Image receiving synchronization unit

214‧‧‧Image magnification unit

22‧‧‧Sound signal receiving circuit

221‧‧‧Second light detecting element

222‧‧‧Filter unit

223‧‧‧Filter unit

224‧‧‧Sound amplification unit

30‧‧‧Electronic devices

40‧‧‧Display electronic device

C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C21, C22, C23, C24, C25, C26, C27, C28, C29, C30, C31‧‧ capacitance

R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R21, R22, R23, R24, R25, R26, R27‧‧

V1, V2, V3, V6‧‧‧ high voltage level

V4‧‧‧First drive voltage

V5‧‧‧second drive voltage

GND‧‧‧low voltage level

T1‧‧‧O crystal

D1‧‧‧ diode

D2‧‧‧ diode

L1‧‧‧Inductance components

1 is a schematic diagram of an embodiment of an audio-visual transmission system and an audio-video receiving system thereof according to the present invention. 2 is a schematic diagram of an embodiment of an image signal transmission circuit of the present invention. 3 is a schematic diagram of an embodiment of an audio signal transmission circuit of the present invention. 4 is a schematic diagram of an embodiment of an image signal receiving circuit of the present invention. FIG. 5 is a schematic diagram of an embodiment of an audio signal receiving circuit of the present invention.

10‧‧‧Video Transmission System

11‧‧‧Image signal transmission circuit

12‧‧‧Sound signal transmission circuit

20‧‧‧Video Receiving System

21‧‧‧Image signal receiving circuit

22‧‧‧Sound signal receiving circuit

30‧‧‧Electronic devices

40‧‧‧Display electronic device

Claims (15)

An audio-visual transmission system for receiving a plurality of video signals and a plurality of audio signals, comprising: an image signal transmission circuit for receiving the image signals, the image signal transmission circuit comprising: an image filtering unit, configured to: Receiving the image signals; an image signal processing unit is electrically coupled to the filtering unit, wherein the image signal processing unit is configured to convert the image signals into a plurality of output image electrical signals; a buffer unit, and the image The signal processing unit is electrically coupled to the image processing unit, and is electrically coupled to the image signal processing unit for receiving the output image electrical signals; a first light emitting diode component and the image synchronization unit electrical And a diode control unit electrically coupled to the first LED component; and an audio signal transmission circuit for receiving the audio signal, the audio signal transmission circuit comprising: a sound filter a unit for receiving the audio signals; an audio signal processing unit electrically coupled to the sound filtering unit, the sound signal processing unit The sound signal is converted into a plurality of output sound signals; a sound synchronization unit is electrically coupled to the sound signal processing unit for receiving the output sound signals; a resonance unit, and the sound The synchronization unit is electrically coupled; and a second LED component is electrically coupled to the sound synchronization unit and the resonance unit; wherein the resonance unit comprises: An inductive component having a first end and a second end, the first end of the inductive component being electrically coupled to the second LED component; a first capacitor having a first end and a second end, the first end of the first capacitor is electrically coupled to the first end of the inductive component, and the second end of the first capacitor is electrically coupled to a low voltage level; a second capacitor having a first end and a second end, the first end of the second capacitor being electrically coupled to the second end of the inductive component, the second end of the first capacitor being low The voltage level is electrically coupled; a third capacitor having a first end and a second end, the first end of the third capacitor being electrically coupled to the second end of the inductive component, the first The second end of the third capacitor is electrically coupled to the low voltage level; and a fourth capacitor having a first end and a second end, the first end of the fourth capacitor and the inductive component The second end is electrically coupled to the second terminal. The second end of the fourth capacitor is electrically coupled to the low voltage level. The video transmission system of claim 1, wherein the image filtering unit comprises: a first capacitor having a first end and a second end, the first end of the first capacitor receiving the a second capacitor having a first end and a second end, the first end of the second capacitor receiving the image signals; a first resistor having a first end and a second end The first end of the first resistor is electrically coupled to the first end of the first capacitor and the first end of the second capacitor; a second resistor having a first end and a first end The first end of the second resistor is electrically coupled to the second end of the second capacitor; a third capacitor having a first end and a second end, the first end of the third capacitor being electrically coupled to the second end of the first resistor and the second end of the second resistor The second end of the third capacitor is electrically coupled to a low voltage level. The video transmission system of claim 1, wherein the buffer unit is a follower. The video transmission unit of claim 1, wherein the image synchronization unit comprises: a first resistor having a first end and a second end, the first end of the first resistor being configured to receive a high voltage level; a second resistor having a first end and a second end, the first end of the second resistor being electrically coupled to the second end of the first resistor; The capacitor has a first end and a second end, the first end of the first capacitor is electrically coupled to the second end of the second resistor, and the second end of the second capacitor is low The voltage level is electrically coupled to the second capacitor, and the second capacitor has a first end and a second end. The first end of the second capacitor is electrically coupled to a high voltage level, the second capacitor The second end is electrically coupled to the low voltage level. The video transmission system of claim 1, wherein the first LED component is a laser diode. The video transmission system of claim 1, wherein the diode control unit comprises: a first resistor having a first end and a second end, the first end of the first resistor receiving a high voltage level; a transistor having a first end, a second end, and a control end, the control end of the transistor being electrically coupled to the second end of the first resistor, the electric The first end of the crystal Electrically coupled to the first LED component, the second end of the transistor is electrically coupled to a low voltage level; a first diode having a first end and a second The first end of the first diode is electrically coupled to the control end of the transistor; and the second diode has a first end and a second end, the second The first end of the pole body is electrically coupled to the second end of the first diode, and the second end of the second diode is electrically coupled to the low voltage level. The video transmission system of claim 1, wherein the sound filtering unit comprises: a first capacitor having a first end and a second end, the first end of the first capacitor being configured to receive And the first resistor and the second end, the first end of the first resistor is electrically coupled to the second end of the first capacitor, the first The second end of the resistor is electrically coupled to a low voltage level. The video transmission system of claim 1, wherein the sound synchronization unit comprises: a first resistor having a first end and a second end, the first end of the first resistor and the sound The signal processing unit is electrically coupled to the first capacitor and has a first end and a second end. The first end of the first capacitor is electrically coupled to the second end of the first resistor. The second end of the first capacitor is electrically coupled to a low voltage level; the second capacitor has a first end and a second end, the first end of the second capacitor and the first resistor The second end of the second capacitor is electrically coupled to the second LED component; the second resistor has a first end and a second end. The first end of the second resistor is electrically coupled to the second end of the second capacitor; a third resistor having a first end and a second end, the first end of the third resistor being electrically coupled to the second end of the second resistor, the second end of the third resistor Electrically coupled to the low voltage level. The video transmission system of claim 1, wherein the second LED component is a laser diode. An audio-video receiving system corresponding to an audio-visual transmission system, comprising: an image signal receiving circuit, comprising: a first light detecting component for sensing a plurality of image light signals and outputting a plurality of sensing image signals; a filtering unit electrically coupled to the photo detecting component; an image receiving synchronizing unit electrically coupled to the photo detecting component; and an image amplifying unit electrically coupled to the image receiving synchronizing unit for outputting a plurality of image signals; and an audio signal receiving circuit, comprising: a second light detecting component for sensing a plurality of sound light signals and outputting a plurality of sensing sound signals; a second filtering unit, and the second The third detecting unit is electrically coupled to the second optical detecting component and receives the sensing sound signals; and a sound amplifying unit electrically coupled to the third filtering unit The sound amplifying unit is configured to output a plurality of sound signals; wherein the third filtering unit comprises: a first resistor having a first end and a second end, the first end of the first resistor being electrically coupled to the second photodetecting element, the second end of the first resistor being low The voltage level is electrically coupled; a first capacitor having a first end and a second end, the first end of the first capacitor being electrically coupled to the second photodetecting element; and a second a resistor having a first end and a second end, the first end of the second resistor being electrically coupled to the second end of the first capacitor, the second end of the second resistor and the sound The amplifying unit is electrically coupled. The video receiving system of claim 10, wherein the first light detecting element and the second light detecting element are light detecting diodes. The video receiving system of claim 10, wherein the first filtering unit comprises: a first capacitor having a first end and a second end, the first end of the first capacitor The first photodetecting element is electrically coupled to the second end of the first capacitor and a low voltage level; a second capacitor has a first end and a second end, the second capacitor One end is electrically coupled to the first photodetecting element, the second end of the second capacitor and the low voltage level; and a third capacitor having a first end and a second end, the first The first end of the third capacitor is electrically coupled to the first photodetecting element, and the second end of the third capacitor is coupled to the low voltage level. The video receiving synchronization unit of claim 10, wherein the image receiving synchronization unit comprises: a first resistor having a first end and a second end, the first end of the first resistor The first photo detecting element is electrically coupled; a second resistor having a first end and a second end, the first end of the second electrical group being electrically coupled to the second end of the first resistor, the second electrical group The second end is electrically coupled to a low voltage level; a third resistor has a first end and a second end, and the first end of the third resistor is electrically coupled to the first photodetecting element The second end of the third resistor is electrically coupled to the low voltage level; a first capacitor having a first end and a second end, the first end of the first capacitor and the first end The first photodetecting element is electrically coupled to the second end of the first capacitor and electrically coupled to the amplifying unit. The video receiving system of claim 10, wherein the image amplifying unit is a differential amplifier. The video receiving system of claim 10, wherein the second filtering unit comprises: a first capacitor having a first end and a second end, the first end of the first capacitor The second photodetecting component is electrically coupled to the second capacitor. The second capacitor is electrically coupled to the low voltage level. The second capacitor has a first end and a second end. The first end of the capacitor is electrically coupled to the second photodetecting element, the second end of the second capacitor is electrically coupled to the low voltage level, and a third capacitor has a first end And a second end, the first end of the third capacitor is electrically coupled to the second photodetecting component, and the second end of the third capacitor is electrically coupled to the low voltage level.