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Method and apparatus to quantize and dequantize input signal, and method and apparatus to encode and decode input signal

A technology of input signal and equipment, which is applied in the field of quantization and inverse quantization of input signal and equipment, as well as encoding and decoding of input signal and equipment, can solve the problems of complex encoding processing and efficiency depending on signal type, etc., to improve compression efficiency and minimize The effect of signal distortion

Inactive Publication Date: 2009-04-08
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology

By using these methods, although efforts have been made to obtain a digital audio signal with a small amount of data, there is a problem that the efficiency mainly depends on the signal type
Therefore, the encoding process has become quite complicated compared to the method of storing only simple PCM data

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  • Method and apparatus to quantize and dequantize input signal, and method and apparatus to encode and decode input signal
  • Method and apparatus to quantize and dequantize input signal, and method and apparatus to encode and decode input signal
  • Method and apparatus to quantize and dequantize input signal, and method and apparatus to encode and decode input signal

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Embodiment Construction

[0054] Embodiments of the present general inventive concept will now be described in detail, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like components throughout. The embodiments are described below in order to explain the present general inventive concept by referring to the figures. Now, a method of quantizing an input signal according to an embodiment of the present general inventive concept will be described in detail with reference to the accompanying drawings.

[0055] figure 1 is a flowchart illustrating a method of quantizing an input signal according to an embodiment of the present general inventive concept.

[0056] From the distribution characteristics of the input signal, a quantization scale type indicating a scale type for quantization is determined (operation 1).

[0057] figure 2 is showing figure 1 A flowchart of operation 1 of the method.

[0058] A generalized Gaussian distribution variable...

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Abstract

A method and apparatus to quantize and dequantize an input signal, and a method and apparatus to encode and decode an input signal. The method of quantizing an input signal includes determining a quantization scale type according to a distribution feature of the input signal, and quantizing the input signal according to the determined quantization scale type. Accordingly, when a number of assigned bits is small in an encoding process, signal distortion can be minimized without an increase in complexity or having to use large sized additional information in order to determine an optimum scale. In addition, the input signal can be encoded by considering a trade-off of a distortion rate corresponding to the number of assigned bits of the input signal.

Description

technical field [0001] The general inventive concept of the present invention relates to an apparatus and method for encoding and decoding an input signal, more particularly, to a method and apparatus for quantizing and dequantizing an input signal to obtain better compression efficiency and a method for encoding an input signal and decoding devices and methods. Background technique [0002] The input signal containing the information is initially an analog signal with a continuous waveform in terms of amplitude and time. Therefore, in order to represent a waveform as a discrete signal, analog-to-digital (A / D) conversion is required. A / D conversion includes two processes. First, a sampling process is used to convert a time-continuous signal to a discrete signal, and second, an amplitude quantization process is used to limit the number of available amplitudes to a finite number. In the magnitude quantization process, at time n, an input magnitude x(n) is converted to an el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26
CPCG10L19/035H04N7/26085H04N19/126H02G3/0412H02G3/045H02G3/0418F16L3/26
Inventor 金重会吴殷美安顿·波佐夫
Owner SAMSUNG ELECTRONICS CO LTD
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