Multimedia video conference services
In the audio encoder in the audio signal to increase the appropriate delay so that the receiver decoder, the video signal and audio signal simultaneously in the meeting, the participants can make use of whiteboard, writing drawing,
Beats By Dre Studio, or writing to express the contents of the phone will written on the slate, converted into electrical signals input to the encoder, after treatment, then transmitted to the other venue and displayed on the monitor. Audio, video and data signals are processed separately from the multiplexing / tap devices these three kinds of signals and signaling and other combinations of ITU-TH. 22 The proposed 64-1920kbit / s digital signal, and then the user / network interface circuit,
tods shoes outlet, the signal is further converted into a signal transmission line channel. This will be the venue through image and sound signals from the MCU to switch the channel to another venue if the venue of the conference venue to watch the other, the devices will receive the signal tap, decoder, D / A conversion, etc., to restore the image signal voice signals, data signals. 2. Multi-point control device (MCU) MCU is a meeting of key equipment in the network, usually set in the network nodes (Tandem) Department. It summarizes the signals from the various venue terminal, simultaneous separation of the image,
MBTシューズ 販売店, voice, data and signaling, then the venue of the same type of information given away the same processor to complete mixing, processing, switching and other processes, and finally reassembled and sent to The meeting venue. Second, the multipoint network of television systems to be held to form a multipoint communication network. This need to solve four problems, one more MCU and the terminal to form a communication network, which is how to configure the MCU, to form a conference network; second is to convene a meeting of the acceptance process during which a conference venue image and voice, that the meeting how to control the problem; third is how to synchronize clocks across the network; Fourth, how the network management. 1. MCU configuration according to H. 231 protocol, MCU configuration should adopt the star structure, shown in Figure 2. Communications protocols must be consistent with 1TU of a series of agreements. Network of more than one MCU, was assigned the highest control over the MCU as the master MCU, the others are from the main MCU MCU-serving chairman of a port - control terminal, the port is known as President - control port. Connected to the terminal for the master terminal, which is where the President will be the structure of Figure 2 with a star field at one end j MCU configuration where the venue for the other terminal at the venue. 2. Conference Hall Conference Control mode control mode are generally three kinds: the voice control mode, control mode imaging, the President control mode. Was more commonly used for the latter: Chairman of the control mode is the main venue where the President to exercise control over, the President can name a sub-venue to speak. Overflow may apply to the President speak,
herve leger toronto, speak only after permission à automatic and manual control mode is divided into two. The automatic control mode is divided into multi-layer protocol (MLP) Chairman of the control and distribution of non-allocation of President control of two multi-layer protocol. However, H. 243 Chairman of limited control and can only be completed by the two main MCU MCU-based control over the main MCU MCU connected to the third President of the control is no longer split into the meeting. The use of multi-layer protocol to accomplish in a controlled manner has a strong functions, can be resolved with the main MCU chain with the first three MCU control of their labor agreement in the ITU is studying the use of PC control is achieved, each of the network MCU port on the PC using RS-232 interface to connect PC, connected with the main MCU-based PC. And from the MCU is connected to the PC for the sub-PC: PC control of the main main MCU: sub main PC and PC computer network through a modem form, through which the transmission of control signals to achieve the meeting. Manual control can be achieved three MCU chained chair control, but preferably not more than 1O an online PC. Because of the delay and to consider other factors. 3. If the system clock synchronized multipoint television constitutes a MCU conference as an example. The system clock can be an external reference clock in the MCU multipoint television system clock phase-locked with a 10 to 11 in the stability of the clock on the external parameters, the system clock in all terminal data sent from the MCU code to extract. Multiple MCU-conferencing systems, the main MCU clock is phase locked to the external reference clock. From the MCU can be seen as the main MCU, terminal = 4. Network management in the manual control mode, PC control signal if the use of 64-1920kbit / s transmission channel of the frame structure of the conference control signal Pc as multipoint network system management network, which completes the time, billing, meeting The list of participants,
herve leger skirts, diagnostic, maintenance and other management functions. More articles related to topics：
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