Compression method and apparatus, decompression method and apparatus, compression/decompression system, peak detection method, program and recording medium

A compression method and technology of a compression device, which are applied in electrical components, speech analysis, instruments, etc., can solve the problems of miniaturization, complex structure, and complicated processing of difficult devices, and achieve high compression ratio and high quality.

Inactive Publication Date: 2003-12-10
酒井康江
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  • Abstract
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Problems solved by technology

Therefore, there is a problem that the processing is complicated, and the structure for realizing the processing is very complicated
It not only pro

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  • Compression method and apparatus, decompression method and apparatus, compression/decompression system, peak detection method, program and recording medium
  • Compression method and apparatus, decompression method and apparatus, compression/decompression system, peak detection method, program and recording medium
  • Compression method and apparatus, decompression method and apparatus, compression/decompression system, peak detection method, program and recording medium

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[0029] Invented embodiment

[0030] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0031] According to the compression method of this embodiment, first, when an analog signal as a compression target signal is input, the input analog signal is A / D converted and converted into digital data. Then, the obtained digital data is processed as follows. In addition, when digital data is input for a signal to be compressed, the digital data is directly subjected to the following processing.

[0032] Figure 1 ~ Figure 3 It is a diagram for explaining the basic principle of the compression method used in this embodiment. among them figure 1 with figure 2 , Is a diagram used to illustrate the principle of rearrangement processing, and figure 1 (a) and figure 2 (a)(b) indicates the original data of the compression target, figure 1 (b) and figure 2 (c) represents data that has been rearranged.

[0033] in figure 1 In the figure, th...

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Abstract

For data to be compressed and having periodicity, two windows of identical size are set for two intervals in accordance with peaks appearing almost periodically and sample data is alternately rearranged between the windows of the identical size, thereby replacing the frequency of data having periodicity with approximately a half frequency without deteriorating reproducibility into original data, so that the replaced data of a low frequency is subjected to compression. This rearrangement processing may be applied to a compression having a characteristic that the compression ratio cannot be increased in a high frequency region, so as to increase the compression ratio without deteriorating the quality of the reproduced data obtained by decompression.

Description

technical field [0001] The present invention relates to a compression method and its device, a decompression method and its device, a compression and decompression system, a peak detection method, a program, and a recording medium, especially related to the compression and decompression methods of continuous analog signals or digital signals. Background technique [0002] Conventionally, when transmitting or storing a signal with a large amount of information such as an image signal or an audio signal, the signal is often compressed / decompressed for the purpose of reducing the amount of transmitted information and increasing the storage time in a storage medium. Generally, when compressing an analog signal, the pulse modulation of the analog signal is first digitized according to a prescribed pulse modulation frequency, and the obtained digital data is compressed. [0003] For example, in the compression of image signals or audio signals, a method of compressing the original...

Claims

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Application Information

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IPC IPC(8): G10L21/04G10L21/003G10L21/007G10L25/90H03M7/30
CPCG10L19/09G10L25/90G10L19/0204
Inventor 小柳裕喜生
Owner 酒井康江
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