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Conversion device, encoding device, decoding device, methods of conversion device, encoding device, and decoding device, and program

A technology of a transformation device and encoding device, which is used in the direction of code conversion, voice analysis, instrument, etc., can solve problems such as reduced compression efficiency and other problems

Pending Publication Date: 2021-08-10
NIPPON TELEGRAPH & TELEPHONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, following the distribution p(x, 2 for example -2 ) value sequence and other sequence values ​​are more biased than the distribution p(x, 2 -1 ) is large, no matter how the Glenbu parameter s or the Rice parameter r is set, the compression efficiency will decrease

Method used

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  • Conversion device, encoding device, decoding device, methods of conversion device, encoding device, and decoding device, and program
  • Conversion device, encoding device, decoding device, methods of conversion device, encoding device, and decoding device, and program
  • Conversion device, encoding device, decoding device, methods of conversion device, encoding device, and decoding device, and program

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no. 1 approach ＞

[0050] "Coding Device"

[0051] refer to figure 2 as well as image 3 , the processing procedure of the encoding method executed by the encoding device 200 including the conversion device 100 according to the first embodiment of the present invention will be described. Such as figure 2 As shown, the coding device 200 of the first embodiment includes the transformation device 100 and the integer coding unit 210 . The conversion device 100 includes a unary encoding unit 110 , a bit inversion processing unit 120 , and a unary decoding unit 130 . Executed by the encoding device 200 of the first embodiment image 3 The processing of each step shown realizes the coding method of the first embodiment including the conversion method of the present invention.

[0052] A sequence of non-negative integer values ​​is input to the encoding device 200 of the first embodiment. As the sequence of non-negative integer values, for example, a signal obtained by converting sound picked up...

no. 2 approach ＞

[0112] In the case of using the Glomb code in the integer coding section, the Glomb parameters used can be adaptively used according to the distribution of the sequence of the input integer values. Therefore, based on the existing method of estimating optimal Glenn parameters, it is possible to obtain the optimum The converted integer sequence can be encoded using the obtained Glenbu parameter s, and decoding corresponding to the encoding can also be performed. This mode will be described as a second embodiment.

[0113] "Coding Device"

[0114] refer to Figure 8 as well as Figure 9 , the processing procedure of the encoding method executed by the encoding device 400 including the second embodiment of the transforming device 100 of the present invention will be described. Such as Figure 8 As shown, the encoding device 400 of the second embodiment includes a parameter determination unit 420 , a conversion device 100 and an integer encoding unit 410 . Executed by the en...

no. 3 approach

[0153] As described above, by performing integer coding after the transformation by the transformation device 100 of the present invention, it is possible to efficiently perform coding when the integer coding unit performs Glomb coding, and the input is based on compliance. A sequence of integer values ​​for the distribution with values ​​greater than 0 and less than 1 as the Glenn Boud parameter. Therefore, according to the existing optimal Glenn parameter estimation method, the optimal Glenn parameter s can be obtained for the partial series based on the series of input integer values, and the obtained Glenn parameter s can be used to determine Whether or not the transformation device 100 of the present invention can adaptively perform the processing of transforming the input sequence of integer values ​​and then coding and the processing of directly coding the input sequence of integer values ​​without transforming the sequence of integer values ​​for each sub-sequence , an...

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Abstract

The present invention provides a technique that is for converting a series of integral values to be used for encoding / decoding, and that can encode even a series of integral values including small values which are not zero and having a distribution greatly biased to smaller values by using a small number of average bits. The present invention is provided with: a unary-coding unit that acquires a code string of unary codes obtained by unary-coding a series based on inputted non-negative integral values; a bit inversion processing unit that substitutes a bit value "1" and a bit value "0" respectively for a bit value "0" and a bit value "1" of respective bits of the code string having undergone the unary-coding, and acquires a substituted code string; and a unary-decoding unit that performs unary-decoding on the substituted code string and acquires a series based on non-negative integral values.

Description

technical field [0001] The present invention relates to a technique for encoding and decoding a sample sequence composed of integer values ​​such as a sample sequence of time-series digital signals of sound and sound, and also relates to the transformation of the sequence of integer values ​​used for encoding and decoding. Background technique [0002] As a technique for encoding a sample sequence for the purpose of compression, there is a method of reversibly encoding a finite-precision value obtained by quantizing the sample value (hereinafter referred to as an integer value) to reduce the number of bits used for describing the sample sequence. length technique. In this technique, which integer value is assigned a code of which length is directly related to the performance of the compression. This fact is no exception in engineering applications of encoding and decoding sample sequences, such as image encoding for encoding and decoding sample sequences of image signals, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M7/40G10L19/00
CPCH03M7/40H03M7/4075G10L19/0017H03M7/165H03M7/3062H03M7/6005H03M7/6011
Inventor 杉浦亮介守谷健弘镰本优
Owner NIPPON TELEGRAPH & TELEPHONE CORP
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