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A Frequency Codec Communication System Based on Serial Port Device

A communication system, coding and decoding technology, applied in transmission systems, digital transmission systems, electrical components, etc., to achieve the effect of expanding the scope of application

Active Publication Date: 2016-08-17
FUJIAN CENTM INFORMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a frequency codec communication system based on a serial port device to solve the problem that the existing serial port signals have multiple frequencies

Method used

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Examples

Experimental program
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Embodiment Construction

[0015] The present invention provides a frequency codec communication system based on a serial port device, including a serial port device and a frequency codec device. The serial port device is used to communicate with the frequency codec device. The frequency codec device can be a common audio communication codec device. The serial port device of the present invention replaces the data to be sent with special data when sending data, so that the data sent by the serial port device has only two frequencies. In order to achieve the above purpose and ensure the communication speed as much as possible, when the serial port device sends a byte of data, it will split the byte data to be sent into two nibble data of high four bits and low four bits, Then these two nibble data are replaced with special byte data and then sent respectively. In order to facilitate the replacement of data by the serial port device, the present invention uses a first index table for replacing the serial ...

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Abstract

The present invention provides a frequency codec communication system based on a serial port device, which includes a serial port device and a frequency codec device. The serial port device is used to send the high four bits and The index byte data corresponding to the lower four bits in the first index table; the frequency codec device is used to decode the received time width as the bit width level of the serial port device into Bit 1, decode the received level whose time width is twice the bit width of the serial port device into bit 0, and match the bit string data obtained after the data reception is completed using the second index table, and obtain Two nibbles of data are concatenated to obtain one byte of data. While ensuring the communication, the present invention makes the signal of the serial port device have only two kinds of frequencies during communication, and enables the serial port to communicate with other communication devices in the manner of frequency coding, thereby expanding the application range.

Description

technical field [0001] The invention relates to a frequency coding and decoding communication system based on a serial port device. Background technique [0002] The serial port device is a design of amplitude encoding. The data bit and parity bit are low level to indicate bit 0, and high level to indicate bit 1. It also includes a start bit (low level) and a stop bit (high level). . When the data is uncertain, there may be multiple consecutive 0 bits or multiple consecutive 1 bits, which will result in multiple frequencies in the encoded signal. In some applications, the frequency has a certain range limit, such as: audio The optimal frequency range for communication is 1.2kHz to 3.4KHz, which results in the serial port device not being able to communicate with other communication devices through frequency coding, which is limited in these applications. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a frequen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
Inventor 蒋声障张登峰余杭军
Owner FUJIAN CENTM INFORMATION