Remote control signal decoding method, device and system

Abstract

The invention discloses a decoding method for remote control signals. The method includes the steps that when the received remote control signals are decoded, first preset carrier frequency in a preset frequency table is subjected to traversal, the remote control signals are decoded in sequence according to the first preset carrier frequency obtained after traversal, data frames of the remote control signals are obtained, and byte values at the preset positions of the data frames are obtained till the byte values which are at the preset positions and obtained through current decoding are matched with preset proof test values; the data frames obtained through decoding in the matching process are determined to be decoding results of the remote control signals. The invention further discloses a decoding device and system for the remote control signals. When the error of frequency sent by a remote control is large, a receiving end can still determine the carrier frequency corresponding to the correct remote control signals by conducting traversal on the first preset carrier frequency in the preset frequency table and finding out the byte values which are at the preset positions and are obtained through decoding and matched with the preset proof test values, and thus correct decoding of the remote control signals is achieved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a decoding method, device and system for remote control signals. Background technique [0002] Currently, most of the products on the market that require remote control (such as televisions, etc.), the coding methods used in the remote control are generally coded by the NEC standard. [0003] The NEC infrared signal is actually a modulated signal based on a 38kHz carrier. According to the standard NEC cycle, the transmission code value corresponding to the remote control command is modulated into the carrier; most decoding schemes are that after receiving the NEC infrared signal, the NEC infrared signal is first decoded. filtering, and then demodulating the detailed code value based on the carrier period of the filtered signal. [0004] For example, an NEC standard remote controller will send a frame of waveform data when it needs to send a remote control command,...

AI Technical Summary

Problems solved by technology

[0013] The main purpose of the present invention is to provide a remote control signal decoding method, device and system, aiming to solve the technical problem that the receiving end cannot decode correctly when the remote control transmits a large error in frequency

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