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Compression method of analog signal input

A technology of analog signal and compression method, which is applied in the computer field and can solve the problems of loss and poor compression of other data.

Inactive Publication Date: 2010-06-02
李晓坤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The default storage method in Microsoft digital ink technology is Ink Serialization (ISF), which also mainly uses the differential method to describe ink marks, and separates other data such as pressure, tilt, pen rotation, time, etc. and compresses them using other compression methods. Good for ink compression, but not good for other data
And this kind of data is an analog signal input, the main content is the fuzzy information of the analog input, which is mainly used for display or identification, not because the information is complete and lossless, and most of the digitalization process is lossy

Method used

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  • Compression method of analog signal input

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Embodiment Construction

[0014] The specific embodiment is to compress and decompress the stroke data of a section of handwritten input, figure 1 is a specific stroke, figure 2 is the time compression of multi-channel input, image 3 is sequence number compression.

[0015] The strokes of handwriting input are as follows figure 1 As shown, the stroke has four channels of X, Y, Z, and T representing the pen tip position, pressure, and time input. The input of the analog signal should be digitally quantized into digital data, as shown in Table 1, which is a simplified schematic diagram of its corresponding digital data. Each time a set of data is input, it is a column of data in the table, such as the pen tip position represented by X and Y; the pressure represented by Z; the time represented by T. One line in the table is an array composed of digital data of one channel, and Xn, Yn, Zn, Tn are used to represent the sequence of each channel. Handwriting input usually adopts a fixed reading speed, ...

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Abstract

The invention discloses a compression method of analog signal input. Digital data obtained by converting analog signal input is converted into mathematic functions through a method of curve fitting, and then the mathematic functions are utilized to record analog signals, thereby achieving the compression effect. The compression process is loss compression to the analog signal input and has the input smoothening effect; moreover, the identifiability of the analog signal input is kept after compression, and the analog signal input can be directly applied to a digital ink technology; the input recorded by using the mathematic functions has vector data characteristics, and can be arbitrarily amplified but keeps smooth without distorsion.

Description

Technical field [0001] The invention relates to a compression method for analog signal input in the computer field, such as the compression of handwritten input data. Background technique [0002] The signals in nature are all analog signals, which are information represented by continuously changing physical quantities. Generally, they are quantified into digital signals by A / D conversion and input to the computer. In the computer, they are digital data, such as the continuous movement of the mouse, which becomes discrete in the computer. coordinate point data. Common computer analog signal inputs are audio and handwriting input. There are many ways to compress audio, but the compression of handwriting input is not perfect, such as the input of devices such as digital pens. Usually, various information of a digital pen is quantified and then input in channels. For example, the ink markup language InkML standard defines handwriting input as 16 channels, including X and Y ch...

Claims

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Application Information

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IPC IPC(8): G06K9/22
Inventor 李晓坤
Owner 李晓坤