In the early 1980s, Wegener Communications Company of the United States designed a practical TV with high-fidelity multi-channel multi-language audio demodulation circuit technology, and named this technology "PANDA-1" (Chinese translation "Panda-1" high fidelity Language stereo sound), and has obtained technical patents in the United States. This sound technology is an analog noise suppression system that acts as a normal sound, typically with a high frequency bandwidth of 280 kHz, while it utilizes half the high frequency bandwidth of 130 kHz to transmit a 15 kHz bandwidth of the baseband audio signal. The dynamic range of the sound signal is compressed at a specific ratio of several tens of times, compressed to a very narrow frequency bandwidth. In this way, each set of images can simultaneously provide up to six audio channels for stereo or bilingual broadcast, and can simultaneously transmit independent radio programs, that is, three sets of stereo or six-way mono can be transmitted at different frequencies. Road. The PANDA-1 sound is used in the analog channel and is analog compression, so the sound quality is quite different from the digital audio signal currently used, but due to the bandwidth saving, several channels are added. Receiving a PANDA-1 sound requires the receiver to have an extended circuit audio carrier demodulator; otherwise the received sound is a high noise and high distortion sound. For receivers with PANDA-1 demodulation, you can listen to six audio or two-channel stereos at will, through remote control, on-screen display, and audio programming.
MAONO is an innovative designer and manufacturer of Lavalier, Podcasting, Wireless, Shotgun, Recording microphones and accessories for Smartphone, Camera and PC, etc.