Frequency modulation (FM) stereo encoder based on Internet software design
A software design, stereo technology, applied in the direction of instrumentation, voice analysis, etc., can solve the problems of low resolution index, loss of stereo sense of stereo, poor separation, etc., achieve low cost, high efficiency, and improve the effect of signal-to-noise ratio
Inactive Publication Date: 2018-05-11
柳州市睿亿联电子商务有限公司
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Problems solved by technology
[0004] The object of the present invention is to provide a kind of FM stereo coder based on Internet software design, to solve the problem that the separation index in the traditional technology is not high, the separation is too poor, and the stereo will lose the stereoscopic effect
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[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0016] see Figures 1 to 3 , in the embodiment of the present invention, an FM stereo encoder based on Internet software design, including a stereo transmitter 1, a signal attenuation circuit 2, a limiter circuit 4, a multiplexer circuit 6, a single chip 7, a composite signal 9 and a switch coding circuit 11, the stereo transmitter 1 is connected with a signal attenuation circuit 2, the signal attenuation circuit 2 is connected with a...
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The invention discloses a frequency modulation (FM) stereo encoder based on Internet software design. The FM stereo encoder comprises stereo transmitters, a multiplexer circuit, a single chip, a composite signal and a switch coding circuit. The stereo transmitters are connected with signal attenuation circuits. The signal attenuation circuits are connected with pre-emphasis circuits. The pre-emphasis circuits are connected with amplitude limiting circuits. The amplitude limiting circuits are connected with low-pass filter circuits. The low-pass filter circuits are connected with the multiplexer circuit. The multiplexer circuit is connected with the single chip. The composite signal is transmitted to the switch coding circuit through the composite signal. The composite circuit is connectedwith an RPF. The RPF separates the 19KHZ and transmits to a frequency doubler. The FM stereo encoder based on the Internet software design can perform stereo coding of audio signals of computer soundcards, CDs, MP3s and the like through the stereo transmitters, can achieves high performance and low cost by using the single chip, and is suitable for wireless audio adapters.
Description
technical field [0001] The invention relates to the field of computer software, in particular to an FM stereo encoder based on Internet software design. Background technique [0002] With the rapid development of integrated circuits, the degree of integration is increasing day by day, and many special circuits can be used in integrated circuits to meet various needs. Although the separation degree above 30dB has a good three-dimensional sense, people are still constantly changing from Technological efforts are made to improve this index, so that the entire audio stage has a higher level to ensure the stability of the sound image. The stereo encoder outputs the left and right microphones and amplifies the L and R signals into the main channel signal. , The auxiliary channel signal suppresses the subcarrier 38khz and then forms and generates a pilot signal, and combines the three signals to form a baseband signal. The traditional matrix type is used, and its separation index i...
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Inventor 黄柳云
Owner 柳州市睿亿联电子商务有限公司