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Ultrasonic communication coding method and system

A coding method, ultrasonic technology, applied in the field of ultrasonic communication coding, can solve the problems of simple design method, low coding robustness, singleness, etc., and achieve the effect of improving quality and bit rate

Active Publication Date: 2015-05-20
IFLYTEK CO LTD
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  • Description
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to construct an ultrasonic communication coding method and system to overcome the problems of limited application in existing solutions that transmit less data within the same time period and have higher real-time performance; solve the problem of insufficient coding robustness High, the watermark detection is inaccurate, and it cannot be detected in time when it is affected by the environment; the technical problem of solving the design method is simple, single, and not flexible enough

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  • Ultrasonic communication coding method and system

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Embodiment Construction

[0029] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0030] like figure 1 As shown, the specific embodiment of the present invention is: build a kind of ultrasonic communication coding method, the steps are as follows:

[0031] Encoding: designing a coding sequence string, and using the coding sequence string to encode the information to be transmitted.

[0032] The specific implementation process is as follows: the code string is not necessarily limited to 8 bits, and the number of bits used needs to be considered in actual application requirements. The more bits, the larger the range of information transmitted, but the time to transmit a limited information is also longer. The present invention takes 8 bits as an example: use 8 bits to encode information, the total number of instructions is 256 (0-255), binary representation is (00000000-11111111), similarly use 4 base description as (0000-3333)....

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Abstract

The invention relates to an ultrasonic communication coding method and system. The method comprises the following steps: designing a coding sequence string and coding to-be-transmitted information by using the coding sequence string; taking the coding sequence string as an input character of a finite state automata in multi-stage skip; mapping a state sequence of the finite state automata to an ultrasonic single-frequency signal, wherein skip of the ultrasonic single-frequency signal state contains coding information. According to the finite state automata-based ultrasonic coding method, a coding scheme can be flexibly designed by the finite state automata, the bit rate of information transmission is effectively improved, and application of ultrasonic communication to actual life can be effectively generalized. A synchronizing signal and an odd even check signal are introduced in the ultrasonic communication, so the quality of information transmission is improved.

Description

technical field [0001] The invention relates to an ultrasonic communication encoding method and system, in particular to an ultrasonic communication encoding method and system based on a finite state automaton. Background technique [0002] Most of the current terminal devices have sound playback and recording functions, and the additional cost of using sound waves for information transmission is low. At the same time, ultrasonic waves have strong directionality during transmission and are less disturbed by the external environment. Therefore, ultrasonic waves are more and more popular for communication. In the current ultrasonic communication system, most of the encoding time is too long, and there is no effective method to ensure the quality of information transmission in long-distance and complex scenarios. The existing encoding method for ultrasonic communication uses some specific single-frequency ultrasonic signals to complete the information transmission, 1 bit inform...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
CPCH04L1/0002H04L1/0014
Inventor 邢猛于振华雷琴辉刘驰管青松
Owner IFLYTEK CO LTD
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