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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
  • Description
  • Claims
  • Application Information

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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 prolongs the processing time required for compression and decompression, but also is an important reason why it is difficult to miniaturize the device

Method used

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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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Embodiment Construction

[0029] Embodiment of the invention

[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 to be compressed is input, the input analog signal is A / D converted and converted into digital data. Then, the obtained digital data is processed as follows. Furthermore, when digital data is input as a signal to be compressed, the following processing is directly performed on the digital data.

[0032] Figure 1 ~ Figure 3 is a basic schematic diagram for explaining the compression method used in this embodiment. in figure 1 and figure 2 , is a diagram illustrating the principle of rearrangement processing, and figure 1 (a) and figure 2 (a)(b) indicates the original data to be compressed, figure 1 (b) and figure 2 (c) shows rearranged data.

[0033] exist figure 1 In , the horizontal axis represents time, and the vertical axis...

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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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