公开(公告)号：US20010041984A1

公开(公告)日：2001-11-15

申请号：US09089628

申请日：1998-06-02

Applicant: U.S. Philips Corporation

Inventor： RENATUS J. VAN DER VLEUTEN

IPC: G10L021/00 ,  G10L019/00

CPC classification number: H03M7/30 ,  G11B20/00007 ,  G11B20/10 ,  G11B2020/00065

Abstract: A data compression apparatus is disclosed for data compressing an information signal, which is in n-level form, n being larger than 2. The data compression apparatus comprises an input terminal (1) for receiving the n-level information signal, an entropy coder, such as an arithmetic coder (4) having an input (2) for receiving an input signal, which is adapted to carry out a lossless encoding step on the input signal, so as to obtain a data compressed output signal at an output (6). The apparatus further comprises a prediction filter (12) for carrying out a prediction step on the n-level information signal so as to obtain a prediction signal and a probability signal determining unit (18) for generating the probability signal in response to said prediction signal. An output terminal (8) is available for supplying said data compressed output signal. (FIG. 1) Further, a data expansion apparatus is disclosed. (FIG. 2)

Abstract translation: 公开了一种用于数据压缩n级大小为n级的信息信号的数据压缩装置。数据压缩装置包括用于接收n级信息信号的输入端（1），熵编码器 ，例如具有用于接收输入信号的输入（2）的算术编码器（4），其适于在输入信号上执行无损编码步骤，以便在输出端（6）处获得数据压缩输出信号 ）。 该装置还包括：预测滤波器（12），用于对n电平信息信号执行预测步骤以获得预测信号;以及概率信号确定单元（18），用于响应所述预测信号产生概率信号 。 输出端子（8）可用于提供所述数据压缩输出信号。 （图1）此外，公开了一种数据扩展装置。 （图2）