Method for realizing two-path calls by utilizing single sound card
A sound card and voice channel technology, applied in the direction of sound input/output, subscriber special services, etc., can solve the problems of small PCB board size, increased hardware cost, and many hardware circuit components, so as to achieve flexible appearance size and reduce device occupancy Area, the effect of reducing hardware cost
Active Publication Date: 2015-11-18
HEBEI FAREAST COMM SYST ENG
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Problems solved by technology
On the one hand, this increases the hardware cost of the equipment. At the same time, there are many components in the hardware circuit, and the size of the PCB board is difficult to make small, which affects the overall volume of the equipment.
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[0030] Example: Reference figure 1 , according to 16-bit stereo sampling, each sampling has 32 bits (bit), that is, 4 bytes (Byte). The first two bytes are the original PCM voice of the left channel, and the last two bytes are the original PCM voice of the right channel. According to design requirements, when a collection cycle is reached, refer to figure 2 Take out the original PCM voice of the left channel from each sample in sequence, and after concatenation, it is the independent original voice package of the left channel, and similarly, the independent original voice package of the right channel can be taken out at the same time. The two voice channels may not be working at the same time. If a certain voice channel is idle, the voice packets taken out from the voice channel can be discarded. The extracted independent voice is transmitted to the opposite end, and the voice can be stored and encoded according to needs before transmission. That is to say, the speech proc...
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The invention discloses a method for realizing two-path calls by utilizing a single sound card in the field of communication scheduling. Single sound card circuit design is used in the method; a sent sound of each call path in double call paths is connected to an acquisition sound channel of the sound card; a received sound of each call path is connected to a play channel of the sound card; a voice acquired from the sound card and a voice played in the sound card are subjected to sound channel dividing treatment through software; the voice is split while being acquired and synthesized while being played; and thus, two-path duplex voice operation is realized. According to the invention, two-path calls can work simultaneously only by using a set of voice circuit (the single sound card); therefore, requirements of two-path full-duplex voice calls of communication commanding and scheduling are satisfied; simultaneously, the hardware cost of equipment is reduced; the occupation area of a hardware circuit is reduced; and thus, the appearance size of the equipment is more flexible.
Description
technical field [0001] The invention belongs to the field of communication scheduling, and in particular relates to a method for realizing two-way calls by using a single sound card. The method uses a single device to support two two-way calls. Background technique [0002] Dispatching communication equipment is a kind of communication equipment that provides production scheduling or command and control for internal enterprises, group users, and rail transit. The dispatcher can realize a series of voice communication functions such as incoming calls, outgoing calls, group calls, conferences, forced insertion, and forced removal. The system is widely used in professional dispatching and communication fields such as electric power, coal, petroleum, military, rail transit, and government emergency. [0003] Most of the dispatching consoles provide independent dual-talk channels, which can talk to two users or hold two dispatching conference calls at the same time. Two recordi...
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IPC IPC(8): H04M3/56G06F3/16
Inventor 安进朝王少贤田国永张华琳万翔
Owner HEBEI FAREAST COMM SYST ENG