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    • 3. 发明公开
    • Data transmission methods and devices
    • US20230412321A1
    • 2023-12-21
    • US18210602
    • 2023-06-15
    • Bin XU
    • Bin XU
    • H04L1/1867H04L47/34
    • H04L1/1867H04L47/34
    • The present invention discloses a data transmission method, and a data transmission device, which relates to the field of wireless communication technology to solve the problem of low reliability in audio data transmission. The data transmission method is applied to a first device and comprises: receiving a first data group transmitted by a second device during a first time interval, the first data group comprising a first initial data group and/or a first retransmission data group, wherein the first initial data group comprises one or more first data packets that have not been transmitted by the second device before the first time interval, and the first retransmission data group comprises one or more second data packets comprising at least a portion of one or more data packets transmitted by the second device before the first time interval that were not successfully received by the first device; generating a target mapping table based on a reception status of the first data group and a reception status of the data packets transmitted by the second device before the first time interval, wherein the reception status comprises a failed reception; and transmitting the target mapping table to the second device within the first time interval. In this way, the reliability of the audio data transmission can be improved.
    • 8. 发明申请
    • M-BRIDGE CLASS-D AUDIO AMPLIFIER
    • M-BRIDGE CLASS-D音频放大器
    • US20110293101A1
    • 2011-12-01
    • US13207659
    • 2011-08-11
    • Bin Xu
    • Bin Xu
    • H04R5/00
    • H03F3/217H04R1/005
    • A M-bridge class-D audio amplifier for portable applications and a method of driving a three-wire audio output device comprises a stereo signal source producing first and second input stereo digital signals; circuitry adapted to receive the first and second input stereo digital signals and produce three stereo signals comprising a first, second, and third digital signal, wherein the three stereo signals generate PWM waves comprising a first, second, and third digital signal PWM wave; exactly three pairs of MOSFETs driven by the first, second, and third digital signal PWM waves respectively; and a three-wire speaker system comprising a first wire driven by the first digital signal PWM wave through the first pair of MOSFETs; a second wire driven by the second digital signal PWM wave through the second pair of MOSFETs; and a common wire driven by the third digital signal PWM wave through the third pair of MOSFETs.
    • 用于便携式应用的M桥D类音频放大器和驱动三线音频输出设备的方法包括产生第一和第二输入立体声数字信号的立体声信号源; 适于接收第一和第二输入立体声数字信号并产生包括第一,第二和第三数字信号的三个立体声信号的电路,其中三个立体声信号产生包括第一,第二和第三数字信号PWM波的PWM波; 分别由第一,第二和第三数字信号PWM波驱动的正好三对MOSFET; 以及三线扬声器系统,包括由所述第一数字信号PWM波通过所述第一对MOSFET驱动的第一线; 由第二数字信号PWM波通过第二对MOSFET驱动的第二线; 以及通过第三对MOSFET的第三数字信号PWM波驱动的公共线。