Audio data transmission system and audio data transmission method
A sound data, transmission system technology, applied in multi-carrier systems, voice analysis, instruments, etc., can solve the problems of misjudgment at the receiving end, signal demodulation errors, etc., to achieve the effect of filtering interference and improving accuracy
Active Publication Date: 2018-04-24
ACER INC
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Problems solved by technology
However, switching that boosts the sound data too much may overwhelm the loudspeaker
At this time, the sound data signal that should be stopped does not stop in time, and the speaker still continues to vibrate leaving a residual sound, causing misjudgment at the receiving end and making the signal demodulation error
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[0028] Devices and methods of use of various embodiments of the present invention are discussed in detail below. It should be noted, however, that the present invention provides many possible inventive concepts that can be implemented in various specific scopes. These specific embodiments are only used to illustrate the device and method of use of the present disclosure, and are not intended to limit the scope of the present invention.
[0029] figure 1 It is a schematic diagram of the audio data transmission system 100 provided by the present invention. like figure 1 As shown, the sound data transmission system 100 includes an encoder 110, a modulation module 120, a speaker 130, a receiver 160, a demodulator 170, a frequency compensator 180 and a decoder 190; wherein the encoder 110, the modulation module 120 and the speaker 130 belong to The transmitting end, while the receiver 160, the demodulator 170, the frequency compensator 180 and the decoder 190 belong to the recei...
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The invention provides a sound data transmission system and a sound data transmission method, the system includes a demodulator and a frequency compensator. The demodulator receives a first radio signal and a second radio signal, and generates a first demodulated signal and a second demodulated signal respectively. The first demodulated signal and the second demodulated signal have at least one frequency respectively. Among the at least one frequency, the frequency whose amplitude is larger than an effective level is an effective frequency. The frequency compensator receives the first demodulation signal and the second demodulation signal, and generates a first frequency compensation signal and a second frequency compensation signal respectively. The first frequency compensation signal and the second frequency compensation signal have an effective frequency respectively, and when the second demodulation signal has more than two effective frequencies, the second frequency compensation signal is equal to the second demodulation signal minus the first frequency compensation Signal. The invention is used to filter out the interference caused by the reverberation signal generated by the loudspeaker, so as to improve the accuracy of the sound data.
Description
technical field [0001] The invention relates to a sound data transmission system and a sound data transmission method, in particular to a sound data transmission system and a sound data transmission method for eliminating the reverberation sound generated by speaker vibration. Background technique [0002] Generally speaking, frequency shift keying (FSK, Frequency Shift Keying) technology is often used to transmit voice data. The speaker at the transmitting end will play the audio data signal, which is then received by the receiving end for demodulation and decoding. When using frequency shift keying technology to transmit voice data, in order to increase the transmission speed, the switching speed of voice data will be increased. However, switching that boosts the sound data too much may overwhelm the loudspeaker. At this time, the sound data signal that should be stopped does not stop in time, and the speaker still continues to vibrate leaving a residual sound, causing m...
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IPC IPC(8): G10L21/0208G10L19/26H04L27/38
Inventor 杜博仁张嘉仁方明峻李佳勋徐文正徐筱琦陈盈达黄开宇杨朝光
Owner ACER INC