Wireless video/audio transmission device for bi-directional communications

• US 6,762,788 B2
• Filed: 05/09/2002
• Issued: 07/13/2004
• Est. Priority Date: 05/09/2002
• Status: Expired due to Fees

• Current Assignee: Tranwo Technology Corporation
• Original Assignee: Tranwo Technology Corporation
• Inventors: Chang, Mu Jung
• Primary Examiner(s): Chan, Wing Fu
• Application Number:
  US10/141,064
• Publication Number:
  US 20030210325A1
• Time in Patent Office: 796 Days
• Field of Search: 348/14-1-, 348/14.12, 348/158, 348/723, 455/78, 455/410, 379/102-1-1
• US Class Current: 348/14.02
• CPC Class Codes: H04N 7/141 between two video terminals, e.g. videophone telephonic communication systems combined with television receiver for reception of entertainment or information matter H04M11/085

Abstract

The present invention provides a wireless video/audio transmission device for bi-directional communications, which comprises an emitting device and a receiving device. The emitting device comprises a 2.4 GHz or 5.7 GHz emitting module and a UHF receiving module. The receiving device comprises a 2.4 GHz or 5.7 GHz receiving module and a UHF emitting module. Video, audio, and a digital control instruction are emitted out by the emitting module after signal processing and transmitted to the receiving module. The receiving module is used to demodulate and convert the signal into a video, an audio, and an output control instruction. A control instruction and an analog audio signal are mixed and modulated by the UHF emitting module and emitted out to the UHF receiving module, thereby demodulating and converting the signal into an audio signal and an output instruction. The present invention accomplishes the capacity of bi-directional communications of audio and digital control to have the functions of intercommunications and security by digital codes.

Claims

1. A wireless video/audio transmission device for bi-directional communications, comprising:

an emitting device comprising a first channel emitting module and a second channel receiving module, a first channel modulator being disposed in said first channel emitting module, said first channel modulator simultaneously modulating a video signal, a first audio signal, and a first control signal generated according to a first digital control instruction into a first carrier signal, which is emitted out by a first channel emission antenna, a second channel demodulator being disposed in said second channel receiving module; and

a receiving device comprising a first channel receiving module and a second channel emitting module, said first channel receiving module being connected to a first channel reception antenna, a first channel demodulator being disposed in said first channel receiving module, said first channel demodulator demodulating said first carrier signal received by said first channel reception antenna back into said video signal, said first audio signal, and said first control signal, a first output instruction being outputted according to said first control signal, a second channel modulator being disposed in said second channel emitting module and used to mix and modulate a second control signal generated according to a second digital control instruction and a received second audio signal into a second carrier signal, which is emitted out by a second channel emission antenna to said second channel receiving module so that said second channel demodulator can demodulate said second carrier signal back into said second control signal and said second audio signal, a second output instruction being outputted according to said second control signal.

2. The wireless video/audio transmission device for bi-directional communications as claimed in claim 1, wherein the frequency of said first channel is selected among 2.4 GHz and 5.7 GHz, and the frequency of said second channel is a UHF channel.

3. The wireless video/audio transmission device for bi-directional communications as claimed in claim 1, wherein a microprocessor is installed in each of said emitting device and said receiving device to control input of said digital control instruction and output of said output instruction.

4. The wireless video/audio transmission device for bi-directional communications as claimed in claim 1, wherein said video signal in said first channel emitting module comes from the input of a video signal source and is received by said first channel modulator after being converted and processed by a video processing circuit, and said video signal source is selected among a charge-coupled device and a complementary metal oxide semiconductor device.

5. The wireless video/audio transmission device for bi-directional communications as claimed in claim 1, wherein said first audio signal in said first channel emitting module and said second audio signal in said second channel emitting module come from the input of microphones and are received by said first channel modulator and said second channel modulator after being converted and processed by a first audio processing circuit and a second audio processing circuit, respectively.

6. The wireless video/audio transmission device for bi-directional communications as claimed in claim 1, wherein said first control signal and said second control signal are received by said first channel modulator and said second channel modulator after being converted and processed by a first digital processing circuit and a second digital processing circuit, respectively.

7. The wireless video/audio transmission device for bi-directional communications as claimed in claim 1, wherein said video signal demodulated by said first channel demodulator is outputted to a display after being processed and converted by a first video conversion circuit.

8. The wireless video/audio transmission device for bi-directional communications as claimed in claim 1, wherein said first audio signal and said second audio signal demodulated by said first channel demodulator and said second channel demodulator are outputted to a speaker device after being processed and converted by a first audio conversion circuit and a second audio conversion circuit, respectively.

9. The wireless video/audio transmission device for bi-directional communications as claimed in claim 1, wherein said first control signal and said second control signal demodulated by said first channel demodulator and said second channel demodulator are outputted after being processed and converted by a first digital conversion circuit and a second digital conversion circuit, respectively.

10. The wireless video/audio transmission device for bi-directional communications as claimed in claim 1, wherein said first digital control instruction is selected among a digital code instruction, a doorbell pushbutton instruction, and a sensor instruction, said first output instruction is selected among a buzzer instruction and a light indication device instruction, said second digital control instruction is selected among a digital code instruction and a pushbutton switch instruction, and said second output instruction is selected among a door control switch instruction and a light control switch instruction.

11. An emitting device of a wireless video/audio transmission device, comprising:

a first channel emitting module at least comprising a first video processing circuit, a first audio processing circuit, a first digital processing circuit, and a first channel modulator;

said first video processing circuit, said first audio processing circuit, and said first digital processing circuit converting video from a video signal source, audio of an audio source, and a first digital control instruction into a video signal, a first audio signal, and a first control signal and transmitting them to said first channel modulator;

said first channel modulator simultaneously modulating said video signal, said first audio signal, and said first control signal into a first carrier signal, which is emitted out by a first channel emission antenna, and

a second channel receiving module at least comprising a second channel demodulator, a second audio conversion circuit, and a second digital conversion circuit;

said second channel demodulator demodulating a received second carrier signal into a second control signal and a second audio signal;

said second audio conversion circuit being used to restore said second audio signal and output it to a speaker device;

said second digital conversion circuit being used to restore said second control signal and output a second output instruction.

12. The emitting device as claimed in claim 11, wherein the frequency of said first channel is selected among 2.4 GHz and 5.7 GHz, and the frequency of said second channel is a UHF channel.

13. The emitting device as claimed in claim 11, wherein a microprocessor is further provided to control input of said first digital control instruction and output of said second output instruction.

14. The emitting device as claimed in claim 11, wherein said video signal source is selected among a charge-coupled device and a complementary metal oxide semiconductor device, and said audio source is a microphone.

15. The emitting device as claimed in claim 11, wherein said first digital control instruction is selected among a digital code instruction, a doorbell pushbutton instruction, and a sensor instruction, and said second output instruction is selected among a door control switch instruction and a light control switch instruction.

16. A receiving device of a wireless video/audio transmission device, comprising:

a first channel receiving module at least comprising a first channel demodulator, a first video conversion circuit, a first audio conversion circuit, and a first digital conversion circuit;

said first channel demodulator demodulating a received first carrier signal into a first video signal, a first audio signal, and a first control signal;

said first video conversion circuit and said first audio conversion circuit being used to respectively restore said first video signal and said first audio signal and output them to a display and a speaker device;

said first digital conversion circuit being used to restore said first control signal and output a first output instruction; and

a second channel emitting module at least comprising a second audio processing circuit, a second digital processing circuit, and a second channel modulator;

said second audio processing circuit and said second digital processing circuit respectively converting audio from an audio source and a second digital control instruction into an audio signal and a second control signal and transmitting them to said second channel modulator, said second channel modulator simultaneously modulating said second audio signal and said second control signal into a second carrier signal, which is emitted out by a second channel emission antenna.

17. The receiving device as claimed in claim 16, wherein the frequency of said first channel is selected among 2.4 GHz and 5.7 GHz, and the frequency of said second channel is a UHF channel.

18. The receiving device as claimed in claim 16, wherein a microprocessor is further provided to control output of said first output instruction and input of said second digital control instruction.

19. The receiving device as claimed in claim 16, wherein said audio source is a microphone.

20. The receiving device as claimed in claim 16, wherein said first digital output instruction is selected among a buzzer instruction and a light indication device instruction, and said second digital control instruction is selected among a digital code instruction and a pushbutton switch instruction.