公开(公告)号：US20050075744A1

公开(公告)日：2005-04-07

申请号：US10502171

申请日：2002-12-23

申请人： Derk Reefman ,  Bernardus Zwaans

发明人： Derk Reefman ,  Bernardus Zwaans

IPC分类号： G11B20/00 ,  G11B20/10 ,  G06F17/00 ,  H04B1/00

CPC分类号： G11B20/10527 ,  G11B2020/00065

摘要： A mixing system for mixing a plurality of digital audio signals, at least one of which is a noise-shaped oversampled digital audio signal having a predetermined sampling frequency and bit resolution, said system comprising a summing unit for computing a sum signal of said plurality of input signals; a clipping unit having an input for receiving said sum signal, said clipping unit clipping said sum signal; further comprising a filter unit between the input terminals and the clipping unit, arranged to selectively suppress frequency components outside an audio frequency band from the sum signal; and a converter unit arranged to receive a clipped sum signal from the clipping unit and to convert said clipped sum signal into an output signal of said bit resolution, using noise-shaping, the clipping unit being arranged to limit the input values to a range of values that the converter is able to handle in a stable manner.

摘要翻译： 一种用于混合多个数字音频信号的混合系统，其中至少一个是具有预定采样频率和比特分辨率的噪声形状的过采样数字音频信号，所述系统包括一个求和单元，用于计算所述多个 输入信号 剪切单元，具有用于接收所述和信号的输入，所述剪切单元限制所述和信号; 进一步包括在所述输入端和所述剪切单元之间的滤波器单元，被布置成从所述和信号有选择地抑制音频频带外的频率分量; 以及转换器单元，其被布置为从所述剪切单元接收剪切和信号，并且使用噪声整形将所述剪切的和信号转换成所述比特分辨率的输出信号，所述剪切单元被布置为将输入值限制到 转换器能够以稳定的方式处理的值。