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The system introduction
GV4110B digital video language lab, using the adaptive multi-channel digital audio in real time packet transmission protocol, combined with the world's most advanced semiconductor embedded (DSP) technology and streaming media technology, the audio signal entirely in the digital stream between the master control equipment and student terminal storage, exchange and transmission, and thus to obtain professional audio effects; make the sound delay time is less than 1 ms.
The system uses the international standard star network structure, the main switch to the students through a UTP cable terminal power supply, two-way simultaneous transmission of control signals and data (and can be extended to transmit high-definition video signals); compared to peer products, our products are more concise way of network cabling, security, installation and maintenance more convenient and faster.
Student terminal external standard keyboard and mouse, and standard monitors, large screen display of the user interface and video broadcasting in English and Chinese input is quick and easy.
The system benefits
Digital audio switching the host using the standard USB 2.0 interface with the host computer is connected to a common network interface or a dedicated data card connection, it achieved the easiest to install, setup, free support with electric plug,and avoid the dual network card settings,compared to other products in the industry has significant advantages:2,High-speed digital audio mixer, transmission capacity make the voice delay is less than 1 ms:3,Student terminal supports Chinese / English article automatically pronunciation demonstration reading,in a timely manner to correct the wrong pronunciation,rapid increase in the oral proficiency of students.4,Advanced semiconductor embedded (DSP) technology to make the system highly integrated, simple and stable:A number of unique user-friendly design: Intelligent control system power:System software to open, students automatically open,System software to exit the system power supply is automatically shut down, the student computers automatically shut downSystem software installation automation:system software installation only need to install knock press Enter key without any settingSupply system through a standard UTP cable for the students to terminal, and the safe voltage is 9V cable crossRJ11 crystal connector microphone headset, high-fidelity magnetic, sound quality is clear and sweet,High tensile strength, flexuralSystem with real-time online self-test function:Student computers can automatically identify the fault of the headphones, and shielding the point of failure, ensure that the system normalStudent machines without coding,and can exchange, plug and play, making the system simpler and convenient.Low-carbon, environmentally friendly, energy-saving: The system structure
The system features list
item | Function | |
Cover all the features of the analog language lab | ||
Teaching function | Audio broadcasting | Screen broadcasting |
Video Broadcasting | Online cinema | |
Screen monitor | Voice intercom | |
Group discussion | Whiteboard | |
Job submission | E-Responder | |
Digital courseware | Electronic show of hands | |
Autonomous learning function | Audio on demand | Text-on-demand |
IP Telephony | Electronic Dictionary | |
Same transfer speed playback | Synchronous playback of sound text | |
Recording repeat it after | In English automatically lead time | |
Simultaneous interpretation | Learning Exchange | |
Keyboard input | ||
Examination function | Independent examination and assessment | The mode of examination papers sent |
Students answer | Paper production | |
Management function | Remote control | Black silence |
Teachers locked | System Settings | |
Students headset automatically detect | Remote delegated administration | |
Support network | Network control | |
Monitor | Electronic roll call | |
Electronic roll call | Remote monitoring | |
Equipment technical indicators parameter
Project Name | The main technical parameters |
System reliability | Mean time between failures: the master control equipment: 10,000 hours, crashes and failures dropped ≤ 1; student machine unit: 10,000 hours, crashes, and the fault dropped ≤ 1;Terminal time you start the success rate of 100%;Conditions of Use: -10-45 °C; Relative Humidity: 20% -80%; atmospheric pressure 86-106Kpa; system power supply 220V ± 22V AC voltage; Power frequency: 50 ± 2.5Hz. |
Digital audio exchange host | Of 128 44.1Khz/16bit audio data transmission, voice delay <1ms;Access to power supply: standard 220V ± 22V power supply, output voltage: 9V, intelligent switches, all the students to terminal power exchanged by audio host unified;SNR> 80dB, distortion <1%;Three-in-one network port (including power supply, control, communication, data exchange, high-definition VGA signal (optional)). |
Digital student terminal | Continuously variable transmission to the same tune: 50% - +200%;SNR> 80dB;Frequency Response: 125Hz-10.0kHz (± 2dB), more than 16-bit linear sampling;The recording time ≥ 600 minutes;Direct drive VGA color LCD screen display (optional);Three-in-one network port (including the feed, data communications, high-definition VGA signal) |
Headset microphone group (two-channel stereo) | Headphones:Frequency Response: 125Hz ~ 8000 Hz, ± 17 dB (0dB = 20uPa The) (input power = 1mW);Electrical Impedance: 32Ω ± 20%;The characteristics of sound pressure level (sensitivity): the ≥ 100dB/1mW (0dB = 20uPa The).Microphone:Frequency response :40-20000HZType: electrets microphone;Free field sensitivity: -47 ± 2 dB (0 dB = 1V/Pa);Directional type; two-way. |
Sound delay | Broadcast ≤ 1ms;Intercom ≤ 1ms;Breaking time: None. |
Network | Adaptive multi-channel digital audio real-time packet transmission protocol, and audio transmission optimization;Triple-play network mode, the audio exchange host to students through a standard UTP cable terminal power supply, data transmission, transfer high-definition VGA signal. |
The picture of GV4110B
digital language lab GV4110B