First, the project overview

The all-digital conference system is a digital audio sound reinforcement system based on network communication and digital transmission processing technology, which ITC has completely independent intellectual property rights. The system uses network time division multiplexing technology, based on voice digitization, to achieve a total of cable at the same time to speak, simultaneous simultaneous interpretation, as well as voting, voting and other basic conference functions. The system has the advantages of multi-functional, high-quality, confidentiality of data transmission, with the help of conference management platform, to achieve the whole process of the implementation of a comprehensive control.

Second, the project needs

Third, the system program

Fourth, the core technology

1, ARM + FPGA dual-core processing architecture

ARM is responsible for complete functional management, scheduling, friendly human-computer interaction, more comprehensive functional expansion. The FPGA has a better real-time processing capabilities, the use of parallel processing, and audio, video transmission and real-time processing has a unique performance advantage. FPGA in the conference system focused on digital communications processing, audio coding, audio decoding, digital mixing and other real-time processing functions.

2, Reduced instruction set of Ethernet MAC controller

Based on the FPGA for the digital conference tailored MAC core, optimize the data transmission process, through the various communication modules in parallel to the way to achieve multi-channel audio data stream that is efficient decoding applications.

3, audio pre-processing technology

From the microphone to pick up the analog signal, often because of the scene environment in a variety of high and low frequency noise, broken sound and other factors, and affect the sound quality of the entire system. Digital conference system through the digital band-pass filter, digital sampling filter, digital audio trap and digital automatic gain and other pre-processing technology to ensure that the quality of audio transmission, improve the user experience and experience.

4, optical fiber communication technology

The use of advanced fiber transmission technology, real-time multi-channel high-quality lossless audio transmission, with zero delay, zero media noise, CD-level zero loss sound quality, long-distance transmission and other characteristics, suitable for high standards of conference sound reinforcement applications, Conference room remote cascade and extension.