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    • 52. 发明授权
    • Crest-factor based gain modification
    • 基于波峰因子的增益修改
    • US09191737B2
    • 2015-11-17
    • US13961399
    • 2013-08-07
    • Bose Corporation
    • Bradford Kyle SubatDilip Gopinath WarrierPaul Joyce
    • H04R3/00H03G3/30H03G7/00
    • H04R3/00H03G3/3005H03G7/002H03G7/007
    • A method for crest-factor based gain modification comprises sampling audio inputs to determine an energy for each input. The inputs are amplified to produce output channels. An average energy is determined for each frame by adding a percentage of a last average energy to a residual percentage of the energy. The last average energy is equal to zero for a first sampling of the audio inputs. The residual percentage is equal to one hundred minus the percentage of the last average energy. The amplifier gain is iteratively reduced by a decrease-step for a fixed period until a number of exceeding-inputs is less than or equal to a maximum. The exceeding-inputs have an average energy that exceeds a maximum-energy. The amplifier gain is iteratively increased by an increase-step for another fixed period until a number of exceeding-inputs is greater than a maximum.
    • 用于基于波峰因子的增益修改的方法包括对音频输入进行采样以确定每个输入的能量。 输入被放大以产生输出通道。 通过将最后平均能量的百分比加到能量的剩余百分比来确定每个帧的平均能量。 对于音频输入的第一次采样,最后的平均能量等于零。 剩余百分比等于百分之一减去最后平均能量的百分比。 放大器增益通过一个固定周期的减小步骤迭代地减少,直到多个超过输入小于或等于最大值。 超过输入的平均能量超过最大能量。 放大器增益通过增加步长迭代增加另一个固定周期,直到多个超过输入大于最大值。