公开(公告)号：US5424739A

公开(公告)日：1995-06-13

申请号：US171485

申请日：1993-12-21

Applicant: Steven R. Norsworthy ,  Rich: David A. ,  Thayamkulangara R. Viswanathan

Inventor： Steven R. Norsworthy ,  Rich: David A. ,  Thayamkulangara R. Viswanathan

IPC: H03M1/08 ,  G06F1/03 ,  H03M3/02 ,  H03M3/04 ,  H03M7/36 ,  H04B14/04 ,  H03M3/00

CPC classification number: H03M7/3042 ,  G06F1/0328 ,  H04B14/046 ,  H03M7/3026

Abstract: A device for digitally shaping the quantization noise of an N-bit digital signal, N being a positive integer, comprises: a register for masking out selected bits of the N-bit digital signal to produce an M-bit digital signal, M being a positive integer less than N; a digital noise-shaping coder, coupled to the register, for shaping the quantization noise of the masked out bits; and an accumulator, coupled to the register and the coder, for accumulating the digital signals received from the register and the coder. Likewise, a method of digitally shaping the quantization noise of an N-bit digital signal, N being a positive integer, comprises the steps of: masking selected bits of an N-bit digital signal to produce an M-bit digital signal, M being a positive integer less than N; digitally coding the masked bits of the N-bit digital signal to produce a B-bit digital signal, B being a positive integer less than N-M; and accumulating the M-bit digital signal and the B-bit digital signal.

Abstract translation: 一种用于数字整形N位数字信号的量化噪声的装置，N是正整数，包括：用于掩蔽N位数字信号的选定位以产生M位数字信号的寄存器，M为 小于N的正整数; 数字噪声整形编码器，耦合到寄存器，用于对掩蔽出的位的量化噪声进行整形; 以及耦合到寄存器和编码器的累加器，用于累加从寄存器和编码器接收的数字信号。 同样地，对N位数字信号（N为正整数）的量化噪声进行数字整形的方法包括以下步骤：屏蔽N位数字信号的选定位以产生M位数字信号，M为 小于N的正整数; 对N位数字信号的屏蔽位进行数字编码以产生B位数字信号，B为小于N-M的正整数; 并累积M位数字信号和B位数字信号。