CN108694826A - A kind of infrared coding-decoding method - Google Patents
A kind of infrared coding-decoding method Download PDFInfo
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- CN108694826A CN108694826A CN201810686679.2A CN201810686679A CN108694826A CN 108694826 A CN108694826 A CN 108694826A CN 201810686679 A CN201810686679 A CN 201810686679A CN 108694826 A CN108694826 A CN 108694826A
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- 238000005457 optimization Methods 0.000 claims abstract description 11
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- 238000004891 communication Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 6
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- 238000004378 air conditioning Methods 0.000 description 3
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- G—PHYSICS
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- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared
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Abstract
The present invention relates to infrared communication technique field, specifically a kind of method of infrared data coding and decoding.This method carries out coding and decoding by finding characteristic value to the regular optimization of infrared data, by characteristic value, and this method is based on waveform coding, and compression ratio is high, has evaded specific agreement, it is not necessary to specifically parse data type, and decoding process is simple and efficient.
Description
Technical field
The present invention relates to infrared communication technique field, encoding and decoding in specifically a kind of infrared data transmission control
Method.
Background technology
The electric appliance and digital class science and technology product being equipped with advances in technology with the development of society, family are more and more no matter
It is conventional television, air-conditioning, water heater, the DVD of digital class, projecting apparatus or smart television of today, box are equipped with one by one
Corresponding conventional hand IR remote controller, a remote controler can only generally control a kind of equipment, poor compatibility, and user uses
It is inconvenient.
Nowadays the universal maturation of Internet technology, the big heat of Internet of Things, before making smart home market that wide market be presented
There are the various home intelligent infrared remote control terminals using controls such as mobile phones in scape, market, and number will be transmitted using mobile phone control
According to, and especially Japanese brands air-conditioning is different from general television set remote control, original infrared data just has 1k multibytes, more
There are the more data informations of 3k, very high want is proposed to transmission bandwidth if initial data encodes directly transmission without processing
It asking, WIFI perhaps can be competent at, and in the smart home field of Internet of Things more using as the low bandwidth low-power consumption such as Zigbee
Transport protocol just seems unable to do what one wishes.And although the infrared data of each electric appliance manufacturer is generally in accordance with PPM (RC-5 codes),
PWM (NEC codes) agreement is in the majority, but is substantially and has carried out derivative extension on this basis, so to the infrared waves of specific manufacturer
Shape is all different, can not directly apply mechanically existing agreement.Therefore, there is an urgent need for a kind of decoding method of infrared data, the party
Infrared initial data can be carried out compression processing and be conducive to transmission by method, also will be to the infrared waveform of nearly all producer in the market
It is applicable in.
Invention content
The problem to be solved in the present invention is to provide a kind of infrared coding-decoding method, and this method can be by infrared initial data
It carries out compressed encoding and is conducive to transmission, be transferred to terminal device and be decoded transmitting or upload background devices decoding matching waveform.
Technical solution is used by the present invention solves the above problems:The infrared coding-decoding method, includes the following steps:
(1), original infrared data is obtained:Corresponding original pulsewidth Value Data is captured using infrared waveform analysis device;
(2), regular optimization processing:After original pwm value rounding, use first pwm value after rounding in data as
Compare successively with each pwm value thereafter with value, as ratio 0.9~1.1 and electrical level polar unanimously if replace with matching
Value, no person maintain initial value, until then regular optimization is completed for the first time after completing the last one pwm value relatively;Then with after regular
Second pwm value of data is handled as matching value using identical method, is completed second of regularization, is so analogized,
Until completing last regularization;
(3), number statistics and sequence:The number that various pulsewidths occur and sequence are counted in data after regular optimization,
Find out the pwm value that occurrence number is more than 5 times;
(4), characteristic value is found out:In the pwm value that step (3) is selected characteristic value is found out with " approximate greatest common divisor " method
T1;
(5), binary coding:The data optimized after will be regular in step (2) remove characteristic value T1, find out each pwm value
Including characteristic value number, and indicated respectively with " 1 " of corresponding number, " 0 ", number uses round after being divided by,
To the direct removal less than 0.5,1 byte is supplied with " 0 " to last less than 8;
(6), coding is completed:The coding that step (5) is completed is changed into corresponding system and takes characteristic value T1 and can provided
It is used to application protocol;
(7), it decodes:After completing coding, relevant device is transferred to by Zigbee or wifi etc. and is decoded, basis is only needed
The binary value of characteristic value T1 and data, you can completion parses original waveform.
Further, " approximate greatest common divisor " method in the step (4) carries out as follows:It finds out wherein minimum
Pwm value t1 makees denominator and is divided by respectively with all values, using t1 as feature if times number interval is all in ± 20% range of integral multiple
Value T1, and most infrared waveform all meets this feature, and to individual special waveforms, it goes beyond the scope, then will if any more than one
T1/2 makees denominator and all values are divided by, using t1/2 as characteristic value T1 if times number interval is all in ± 20% range of integral multiple,
If any more than one go beyond the scope then t1/4 directly as characteristic value T1.
Further, the infrared waveform analysis device in the step (1) includes infrared waveform analyzer etc..
Further, the step (2) further includes that second pwm value of regular rear data is direct if with front equivalence
The step of next matching value, is selected in jump.
Compared with prior art, the present invention having the advantages that:Using minimum pulse width as characteristic value come to infrared
Data carry out soft coding, eliminate the interference signals such as burr, compression is also achieved to the coding of overlength, such as Japanese class air-conditioning waveform
Length some can reach 500ms, close compared to initial data with the method for the present invention coded data about 120Byte or so
3000Byte, compression ratio have reached 1:25;And this method is based on waveform coding, has evaded specific agreement, it is not necessary to specific solution
It is guidance code, address code or function code etc. to analyse these data, and decoding process is simple and efficient.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the infrared original waveform figure of the embodiment of the present invention.
Fig. 2 is the coding step flow chart of the embodiment of the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment 1.
As shown in Fig. 1 to 2, a kind of infrared coding-decoding method in the embodiment of the present invention includes the following steps:
S1, original infrared data is obtained:Infrared original waveform and right is captured using equipment such as infrared waveform analyzers
The original pulsewidth Value Data answered, " H " " L " before pwm value indicate high level and low level pulse respectively.
S2, regular optimization processing:After original pwm value rounding, use first pwm value after rounding in data as matching
Value compares with each pwm value thereafter successively, as ratio 0.9~1.1 and electrical level polar unanimously if replace with matching value,
No person maintains initial value, until the relatively rear optimization regular for the first time of the last one pwm value is completed;Then with the data after regular
Second pwm value is directly jumped under choosing in selected matching value if the front matching value of used equivalence as matching value
One matching value, is handled in the same way, is completed second of normalized, is so analogized, until completing last normalizing
Change is handled, and as shown in S2 in Fig. 2, uses H4472 as matching value first, the first suboptimization, which gets off 3 to be worth, to be normalized to
H4472, data after the completion of regular optimization are referring in Fig. 2 shown in S2 right frames.
S3, number statistics and sequence:The number that various pulsewidths occur and sequence are counted in data after regular optimization, are looked for
Go out the pwm value that occurrence number is more than 5 times.
S4, characteristic value is found out:Characteristic value T1 is found out with " approximate greatest common divisor " method in the pwm value that step S3 is selected,
" approximate greatest common divisor " method use following steps, find out wherein minimum pulse width value t1 make denominator respectively with all values phase
It removes, using t1 as characteristic value T1 if times number interval is all in ± 20% range of integral multiple, most infrared waveform all meets
This feature, and to individual special waveforms, it goes beyond the scope if any more than one, then t1/2 is made into denominator and all values are divided by, such as multiple
Section all in ± 20% range of integral multiple then using t1/2 as characteristic value T1, it is direct if any the more than one then t1/4 that goes beyond the scope
As characteristic value T1;Meet ± 20% range of integral multiple after being divided by such as minimum value t1=530 in the present embodiment and other 2, therefore
T1=t1;To more special waveform, such as H600, L410, then characteristic value is used as by 205.
S5, binary coding:Data after will be regular in step S2 remove characteristic value T1, and finding out each pwm value includes
Characteristic value number, and indicated respectively with " 1 " of corresponding number, " 0 ", number is (infrared using round after being divided by
The long pwm value such as guidance code be divided by after there are decimal, round does not influence infrared property, and numeric data code should use
Characteristic matching, error very little), to the direct removal less than 0.5, should be the interference signals such as some burrs, to last less than 8
1 byte is supplied with " 0 " in position (1 byte).
S6, coding is completed:The coding completed in step S5, which is changed into corresponding system, and takes characteristic value T1 to provide
It is used to application protocol.
S7, decoding:After completing coding, relevant device is transferred to by Zigbee or wifi etc. and is decoded, basis is only needed
The binary code value of characteristic value T1 and data, you can completion parses original waveform.Such as the present embodiment T1=530us, pass
The defeated data to come are { 0xFF, 0x00,0xA2 ... ... }, and the corresponding binary systems of 0xFF are BIN:11111111, therefore first is
High level and length are 530us*8=4240us, and second 0x00 is decoded as low level L4240, third 0xA2 (BIN:
10100010), Xie Mawei [H530,L530,H530,L1590,H530,L530]6 pwm values.First H4240 and original number
It is H4240/H4472=95% according to similarity, each pwm value decoded back rate specifically participates in table 1.
Original waveform length of the embodiment of the present invention reaches nearly 140ms, real data 31Byte after being encoded with the method for the present invention,
It (is calculated with 4 Byte of a pwm value) compared to initial data 328Byte, the present embodiment compression ratio is 1:11.This method is based on
Waveform coding, to RC-5 codes, NEC codes or other special formats can all realize coding compression, and crushing rate is low, and decoding process is simply bright
.
| Original value | H4472.1 | L4486.7 | L530.5 | H568.2 | L1620.9 |
| Decoded back value | H4240 | L4240 | L530 | H530 | L1590 |
| Similarity | 95% | 94% | 99% | 93% | 98% |
Table 1:The pwm value reduction rate computational chart of the embodiment of the present invention
It should be pointed out that the detailed description carried out above to technical scheme of the present invention by preferred embodiment is schematical
And not restrictive.Those skilled in the art can be to recorded in embodiment on the basis of reading description of the invention
Technical solution modify or equivalent replacement of some of the technical features, and these modifications or replacements, not
The essence of corresponding technical solution is set to be detached from the range of technical solution of the embodiment of the present invention.
Claims (4)
1. a kind of infrared coding-decoding method, which is characterized in that include the following steps:
(1), original infrared data is obtained:Corresponding original pulsewidth Value Data is captured using infrared waveform analysis device;
(2), regular optimization processing:After original pwm value rounding, use first pwm value after rounding in data as matching value
Compare successively with each pwm value thereafter, as ratio 0.9~1.1 and electrical level polar unanimously if replace with matching value, it is no
Person maintains initial value, until then regular optimization is completed for the first time after completing the last one pwm value relatively;Then with regular rear data
Second pwm value as matching value using identical method handle, complete second of regularization, so analogize, until
Complete last regularization;
(3), number statistics and sequence:The number that various pulsewidths occur and sequence are counted in data after regular optimization, are found out
Occurrence number is more than 5 pwm values;
(4), characteristic value is found out:In the pwm value that step (3) is selected characteristic value T1 is found out with " approximate greatest common divisor " method;
(5), binary coding:The data optimized after will be regular in step (2) remove characteristic value T1, and finding out each pwm value includes
Characteristic value number, and indicated respectively with " 1 " of corresponding number, " 0 ", number uses round after being divided by, to small
In 0.5 direct removal, 1 byte is supplied with " 0 " to last less than 8;
(6), coding is completed:The coding that step (5) is completed is changed into corresponding system and takes characteristic value T1 and be provided to and is answered
It is used with agreement;
(7), it decodes:After completing coding, relevant device is transferred to by Zigbee or wifi etc. and is decoded, it only need to be according to feature
The binary value of value T1 and data, you can completion parses original waveform.
2. a kind of infrared coding-decoding method according to claim 1, which is characterized in that in the step (4) " approximate most
Big common divisor " method carries out as follows:It finds out wherein minimum pulse width value t1 and makees denominator and be divided by respectively with all values, such as multiple area
Between all in ± 20% range of integral multiple then using t1 as characteristic value T1, and most infrared waveform all meets this feature, and
It to individual special waveforms, goes beyond the scope if any more than one, then t1/2 is made into denominator and all values are divided by, a such as times number interval all exists
Then using t1/2 as characteristic value T1 in ± 20% range of integral multiple, if any more than one go beyond the scope then t1/4 directly as feature
Value T1.
3. a kind of infrared coding-decoding method according to claim 1, which is characterized in that the infrared waves in the step (1)
Conformal analysis equipment includes infrared waveform analyzer etc..
4. a kind of infrared coding-decoding method according to claim 1, which is characterized in that the step (2) further includes regular
Second pwm value of data directly jumps the step of selecting next matching value if with front equivalence afterwards.
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| CN111260910A (en) * | 2020-02-24 | 2020-06-09 | 珠海荣邦智能科技有限公司 | Control method, device and circuit of infrared transmitting tube |
| CN111817725A (en) * | 2020-08-21 | 2020-10-23 | 济南赛英立德电子信息股份有限公司 | High-efficiency compression algorithm for infrared remote control code library of universal air conditioner |
| CN112330948A (en) * | 2021-01-04 | 2021-02-05 | 杭州涂鸦信息技术有限公司 | Infrared remote control code matching method and device, computer equipment and readable storage medium |
| CN113850988A (en) * | 2020-12-24 | 2021-12-28 | 广东朝歌智慧互联科技有限公司 | Key value correction method, device, equipment and computer readable medium |
| CN114120466A (en) * | 2021-11-22 | 2022-03-01 | 浙江嘉科电子有限公司 | Coding and decoding device and method for polling information exchange |
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| CN111260910A (en) * | 2020-02-24 | 2020-06-09 | 珠海荣邦智能科技有限公司 | Control method, device and circuit of infrared transmitting tube |
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| CN114120466A (en) * | 2021-11-22 | 2022-03-01 | 浙江嘉科电子有限公司 | Coding and decoding device and method for polling information exchange |
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