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Signal processing method and system

A signal processing and signal technology, applied in the field of signal processing methods and systems, can solve problems such as distortion of output signals and source signals, and achieve the effect of reducing distortion

Active Publication Date: 2014-02-19
HUAWEI TECH CO LTD
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Problems solved by technology

[0008] In the research on jitter quantization, the inventors found that the use of jitter quantization can not completely solve the problems of traditional quantization methods at low bit rates. The values ​​are very different, so in the case of low bit rate, the output signal and the source signal after quantization using jitter still have large distortion

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] First introduce the signal processing method provided by the embodiment of the present invention, figure 1 The flow of the signal processing method provided by an embodiment of the present invention is described, including:

[0031] 101. Obtain a source signal that needs to be quantized.

[0032] The source signal can be one-dimensional, or two-dimensional, or more than two-dimensional.

[0033] 102. Quantize the source signal to obtain a quantized signal ...

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Abstract

The invention relates to a signal processing technology and discloses a signal processing method and system. The signal processing method comprises the following steps of: acquiring source signals which need to be quantized; quantizing the source signals to obtain quantized signals of which values are distributed in a continuous interval; and converting the quantized signals according to the probability distribution of the source signals to obtain output signals, wherein the probability distribution of the output signals and the probability distribution of the source signals are same. By the adoption of the signal processing method and system, the distortion of the output signals can be reduced, especially on the condition of a low code rate.

Description

technical field [0001] The invention relates to digital signal processing technology, in particular to a signal processing method and system. Background technique [0002] In digital signal processing, quantization plays an important role. Quantization is to discretize a signal with continuous values ​​for easy processing by digital devices. In the quantization process, it is usually required that the output signal has as high a degree of approximation as possible to the source signal, however, this degree of approximation will be limited by storage capacity, computing power or transmission bandwidth. The traditional quantization method is to select a distortion metric and minimize the distortion metric under the condition of a limited code length, wherein, the code rate and the distortion metric are in the average sense realized by multiple quantizations. [0003] When the code rate is high, minimizing the distortion metric can make the output signal have a higher degree ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M7/00
Inventor 李旻岳亚努什克雷萨威廉巴斯蒂安克莱恩
Owner HUAWEI TECH CO LTD