CN114071202B - Infrared identification device and method thereof - Google Patents
Infrared identification device and method thereof Download PDFInfo
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- CN114071202B CN114071202B CN202010753583.0A CN202010753583A CN114071202B CN 114071202 B CN114071202 B CN 114071202B CN 202010753583 A CN202010753583 A CN 202010753583A CN 114071202 B CN114071202 B CN 114071202B
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- 230000005540 biological transmission Effects 0.000 claims description 23
- 238000012795 verification Methods 0.000 claims description 15
- 230000008054 signal transmission Effects 0.000 claims description 12
- 230000001934 delay Effects 0.000 claims description 8
- 238000004378 air conditioning Methods 0.000 claims description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
- H04N21/42206—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor characterized by hardware details
- H04N21/42221—Transmission circuitry, e.g. infrared [IR] or radio frequency [RF]
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- Multimedia (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
An infrared identification device comprising: a first infrared receiver for receiving an infrared signal; the control unit is electrically connected with the first infrared receiver and is used for receiving the infrared signals received by the first infrared receiver; a second infrared receiver for receiving the infrared signal; the infrared converter is electrically connected with the second infrared receiver and is used for receiving the infrared signals received by the second infrared receiver, temporarily delaying the infrared signals, carrying out logic operation on the infrared signals and then transmitting the logic operation to the control unit; the control unit is further used for decoding and restoring the infrared signals after logic operation, comparing and verifying the decoded and restored infrared signals with the infrared signals received by the first infrared receiver, and accordingly determining whether the first infrared receiver and the second infrared receiver can work normally.
Description
Technical Field
The invention relates to the field of infrared reception, in particular to an infrared identification device and an infrared identification method.
Background
Generally, the set top box is provided with two sets of infrared receivers, the first infrared receiver is arranged on the set top box board, and the second infrared receiver is connected through the extension receiving line by the external interface, so that when the set top box is limited in placement position, the infrared signal can be received by the second infrared receiver connected through the extension receiving line. However, when the set top box is verified, because the infrared rays have reflection and nondirectionality, after a verifier presses down the remote controller, the CPU cannot distinguish whether the signal is received by the first receiver or the second receiver, so that whether the first receiver and the second receiver can work normally cannot be verified.
Disclosure of Invention
In view of the foregoing, it is necessary to provide an infrared identification device for verifying whether the first receiver and the second receiver are both capable of operating normally, and an infrared identification method.
An infrared identification device according to an embodiment of the present invention includes:
a first infrared receiver for receiving an infrared signal;
the control unit is electrically connected with the first infrared receiver and is used for receiving the infrared signals received by the first infrared receiver;
a second infrared receiver for receiving the infrared signal;
the infrared converter is electrically connected with the second infrared receiver and is used for receiving the infrared signals received by the second infrared receiver, temporarily delaying the infrared signals, carrying out logic operation on the infrared signals and then transmitting the logic operation to the control unit;
the control unit is further used for decoding and restoring the infrared signals after logic operation, comparing and verifying the decoded and restored infrared signals with the infrared signals received by the first infrared receiver and outputting verification signals according to verification results.
Preferably, the infrared converter includes:
the temporary storage delay unit is used for temporarily storing and delaying outputting the infrared signal received by the second infrared converter; a waveform generator for generating a MASK signal;
and the logic unit is used for outputting the infrared signal received by the second infrared converter and the MASK signal phase to the control unit.
Preferably, the control unit is further configured to determine whether the infrared signal received by the first infrared receiver is the same as the infrared signal received by the second infrared receiver; a kind of electronic device with high-pressure air-conditioning system
When the infrared signal received by the first infrared receiver is the same as the infrared signal received by the second infrared receiver, the first receiver and the second receiver are determined to work normally.
Preferably, the infrared converter includes a transmission pin, the transmission pin is used for judging whether the line has signal transmission, and when the line is determined to have no signal transmission, the infrared converter transmits the infrared signal after logic operation to the control unit through the transmission pin.
Preferably, the transmission protocol of the infrared signal is a NEC protocol, and the waveform generator is further configured to generate the MASK signal according to the NEC protocol, so that the infrared signal after logic operation can be decoded and restored.
An embodiment of the present invention provides an infrared identification method, which is applied to an infrared identification device, wherein the infrared identification device includes a first infrared receiver, a control unit, a second infrared receiver and an infrared converter, and the infrared identification method includes:
the first infrared receiver receives an infrared signal and sends the infrared signal to the control unit;
the second infrared receiver receives the infrared signal and sends the infrared signal to the infrared converter;
the infrared converter temporarily stores, delays and logically operates the infrared signal received by the second infrared receiver;
the infrared converter sends infrared signals subjected to logic operation to the control unit;
and the control unit decodes and restores the infrared signals after logic operation, and compares and verifies the decoded and restored infrared signals with the infrared signals received by the first infrared receiver.
Preferably, the infrared converter includes a temporary storage delay unit, a waveform generator, and a logic unit, and the step of performing temporary storage delay and logic operation on the infrared signal received by the second infrared receiver by the infrared converter specifically includes the following steps:
the temporary storage delay unit temporarily stores and delays outputting the infrared signal received by the second infrared converter;
the waveform generator generates a MASK signal;
and the logic unit outputs the infrared signal received by the second infrared converter and the MASK signal phase to the control unit.
Preferably, the step of comparing and verifying the decoded and restored infrared signal with the infrared signal received by the first infrared receiver specifically includes the following steps:
judging whether the infrared signal received by the first infrared receiver is the same as the infrared signal received by the second infrared receiver;
when the infrared signal received by the first infrared receiver is the same as the infrared signal received by the second infrared receiver, the first receiver and the second receiver are determined to work normally.
Preferably, the infrared converter includes a transmission pin, and the step of transmitting the infrared signal subjected to the logic operation to the control unit by the infrared converter specifically includes the following steps:
the transmission pin judges whether the line has signal transmission or not;
and when no signal transmission is determined on the line, the infrared converter transmits the infrared signal subjected to logic operation to the control unit through the transmission pin.
Preferably, the transmission protocol of the infrared signal is NEC protocol, and the step of generating a MASK signal by the waveform generator specifically includes:
and generating the MASK signal according to the NEC protocol, so that the infrared signal subjected to logic operation can be decoded and restored.
Compared with the prior art, the infrared identification device and the method thereof provided by the embodiment of the invention have the advantages that the infrared signals are received through the first infrared receiver and transmitted to the control unit, the infrared signals are received through the second infrared receiver and transmitted to the infrared converter, the infrared converter temporarily delays the infrared signals received by the second infrared receiver and transmits the infrared signals to the control unit after logic operation, the control unit decodes and restores the infrared signals after logic operation, and the decoded and restored infrared signals are verified with the infrared signals received by the first infrared receiver, so that whether the first infrared receiver and the second infrared receiver can work normally is determined.
Drawings
Fig. 1 is a schematic block diagram of an infrared identification device according to an embodiment of the invention.
Fig. 2 is a schematic diagram of a module of another embodiment of the infrared identification device of the present invention.
Fig. 3 is a waveform diagram of an infrared signal based on NEC protocol according to the present invention.
Fig. 4 is a waveform diagram of a boot code of the NEC protocol data format of the present invention.
Fig. 5 is a waveform diagram of a logical "0" of the NEC protocol data format of the present invention.
Fig. 6 is a waveform diagram of a logical "1" of the NEC protocol data format of the present invention.
Fig. 7 is a waveform diagram of MASK signals according to the present invention.
Fig. 8 is a schematic flow chart of decoding and restoring an infrared signal by the control unit of the present invention.
Fig. 9 is a flowchart of an embodiment of an infrared identification method.
Description of the main reference signs
Device 10 capable of identifying multiple groups of infrared receivers
First infrared receiver 20
Control unit 101
Infrared converter 102
Second infrared receiver 30
Temporary delay unit 1021
Waveform generation unit 1022
Logic operation unit 1023
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
Referring to fig. 1, fig. 1 is a schematic diagram of an infrared identification apparatus 10 according to an embodiment of the invention. In this embodiment, the infrared recognition device 10 is adapted to verify the functions of the first infrared receiver 20 and the second infrared receiver 30, where the first infrared receiver and the second infrared receiver are used to receive infrared signals, and the infrared signals may be sent by a remote control of a television. The infrared identification apparatus 10 comprises a first infrared receiver 20 control unit 101, an infrared converter 102 and a second infrared receiver 30.
In this embodiment, the control unit 101 is electrically connected to the first infrared receiver 20, and is configured to receive the infrared signal received by the first infrared receiver 20. The first infrared receiver 20, the second infrared receiver 30, and the second infrared receiver 30 are configured to receive the infrared signal. The infrared converter 102 is electrically connected to the second infrared receiver 30, and is configured to receive the infrared signal received by the second infrared receiver 30, temporarily delay the infrared signal, perform a logic operation on the infrared signal, and transmit the logic operation to the control unit 101. The control unit 101 is further configured to decode and restore the infrared signal after the logic operation, compare and verify the decoded and restored infrared signal with the infrared signal received by the first infrared receiver 20, and output a verification signal according to the verification result. The verification signal may be a display lamp signal, for example, when the verification result is that the first infrared receiver 20 and the second infrared receiver 30 can work normally, the display lamp is green, and when the verification result is that the first infrared receiver 20 and the second infrared receiver 30 cannot work normally, the display lamp is red. In other embodiments of the present invention, the verification signal may be other signals, which are not limited herein.
In this embodiment, the infrared recognition device 10 may be provided in a set-top box. When the infrared identification device 10 is disposed in the set top box, the first infrared receiver 20 may be disposed inside the set top box and used for receiving infrared signals, the second infrared receiver 30 may be connected through an extension receiving line, disposed outside the set top box, and the placement position may be set according to the actual requirement, so that the second infrared receiver 30 may be placed at a position without space blocking according to the space requirement.
Referring to fig. 2, fig. 2 is a schematic structural view of another embodiment of an infrared identification apparatus 10 according to the present invention. The difference between the present embodiment and the above embodiment is that the infrared converter 102 includes a temporary delay unit 1021, a waveform generator 1032, and a logic unit 1033.
In this embodiment, the temporary delay unit 1021 is configured to temporarily store and delay outputting the infrared signal received by the second infrared converter. The waveform generation unit 1022 is configured to generate MASK signals. The logic operation unit 1023 is configured to output the infrared signal received by the second infrared converter 104 and the MASK signal phase to the control unit 101.
In this embodiment, the control unit 101 is further configured to determine whether the infrared signal received by the first infrared receiver 20 is the same as the infrared signal received by the second infrared receiver 104; and when the infrared signal received by the first infrared receiver 20 is the same as the infrared signal received by the second infrared receiver 30, outputting a first verification signal to determine that the first infrared receiver 20 and the second infrared receiver 30 work normally; when the infrared signal received by the first infrared receiver 20 is different from the infrared signal received by the second infrared receiver 30, a first verification signal is output to determine that the first infrared receiver 20 and the second infrared receiver 30 cannot work normally.
In this embodiment, the infrared converter 102 includes a transmission Pin1, where the transmission Pin1 is used to determine whether the line has signal transmission, and when it is determined that the line has no signal transmission, the infrared converter 102 transmits the infrared signal after the logic operation to the control unit 101 through the transmission Pin.
In this embodiment, the transmission protocol of the infrared signal is a NEC protocol, and the waveform generating unit 1022 generates the MASK signal according to the NEC protocol, so that the infrared signal after the logic operation can be decoded and restored.
Specifically, please refer to fig. 3 together, fig. 3 is a waveform diagram of an infrared signal based on the NEC protocol according to the present invention. As shown in fig. 3, the data format of the NEC protocol includes a boot code, an 8-bit user code (or user code inversion), an 8-bit key data code, and an 8-bit key data inversion, wherein the 8-bit user code, the 8-bit user code (or user code inversion), the 8-bit key data code, and the 8-bit key data inversion are composed of a logic "0" and a logic "1". Referring to fig. 4-6 together, fig. 4-6 are schematic diagrams of a boot code, a logic "0" and a logic "1" of the NEC protocol data format, respectively. As shown in fig. 4-6, the pilot code consists of a 9ms carrier +4.5ms idle; logical "0" is defined by: 560us of carriers+560 us; logic "1" is idle for 560us carrier +1.68 ms.
Referring to fig. 7, fig. 7 is a waveform diagram of a MASK signal according to the present invention. According to the data format of the NEC protocol, the shortest high level signal lasts 560us (logic 0/1), so the maximum duration of the low level signal (x) of the Mask waveform cannot be greater than 560us (ensuring that the logic 0/1 is not fully affected and cannot be decoded and restored), and the maximum duration of the high level signal (y) of the Mask waveform is greater than 4.5ms and less than 9ms (ensuring that the pilot is generated to the pilot code so that it can be distinguished from the signal received by the first infrared receiver 20 and cannot interfere with the high level of the pilot code and the first Bit of the user code at the same time).
Referring to fig. 8, a decoding flow chart of the control unit 101 of the present invention for decoding the reduced infrared signal is shown in fig. 8. Based on the data format of the NEC protocol and the MASK signal waveform, the decoding process of the control unit 101 for decoding and restoring the signal received by the second infrared transceiver 104 is as follows:
step S1: detecting the waveform of a high-level signal and then a low-level signal, wherein the duration of the high level TotalHigh is 0, and the number of low level times LowCounter is 0 in an initial state;
step S2: judging whether the duration T x us of the low level signal is equal to x us, if yes, executing the step S3, otherwise, jumping to the step S5;
step S3: accumulating the duration of the high level signal to TotalHigh;
step S4: increasing the number of low level signals (LowCounter) and returning to step S1;
step S5: judging whether the duration of the low level signal satisfies the following conditions: 4.5ms < = T > = 4.5ms+xus, if not, returning to step S1, if yes, executing step S6;
step S6: a high level signal (loadhigh) of the pilot code is obtained as totalhigh+x, which is LowCounter;
step S7: judging whether the duration of the high level signal of the pilot code satisfies the following conditions: the process returns to step S1 if the ratio of loaderhigh < = 9ms =/9 ms is equal to or greater than loaderhigh =/9 ms, and if yes, step S8 is executed:
step S8: obtaining a modified guide code and performing fault-tolerant decoding on a logic 0/1 waveform;
step S9: and judging whether the fault-tolerant decoded signal is the same as the signal received by the first infrared receiver 20, and if not, returning to the step S1.
Referring to FIG. 9, a flowchart of an infrared identification method according to an embodiment of the invention is shown. In the present embodiment, the infrared recognition method is applied to the above-described infrared recognition apparatus 10, and the infrared recognition method includes the steps of:
step S901: the first infrared receiver 20 receives the infrared signal and sends it to the control unit 101.
Step S902: the second infrared receiver 30 receives the infrared signal and sends it to the infrared transducer 102.
Step S903: the infrared converter 102 temporarily delays and logically operates the infrared signal received by the second infrared receiver 30.
Specifically, the infrared converter includes a temporary storage delay unit, a waveform generator, and a logic unit, and the step of performing temporary storage delay and logic operation on the infrared signal received by the second infrared receiver by the infrared converter specifically includes the following steps:
the temporary storage delay unit temporarily stores and delays outputting the infrared signal received by the second infrared converter;
the waveform generator generates a MASK signal;
specifically, the transmission protocol of the infrared signal is NEC protocol, and the step of generating the MASK signal by the waveform generator specifically includes:
and generating the MASK signal according to the NEC protocol, so that the infrared signal subjected to logic operation can be decoded and restored.
And the logic unit outputs the infrared signal received by the second infrared converter and the MASK signal phase to the control unit.
Step S904: the infrared converter 102 transmits the infrared signal subjected to the logical operation to the control unit 101.
Specifically, the infrared converter includes a transmission pin, and the step of sending the infrared signal subjected to logic operation to the control unit by the infrared converter specifically includes the following steps:
the transmission pin judges whether the line has signal transmission or not;
and when no signal transmission is determined on the line, the infrared converter transmits the infrared signal subjected to logic operation to the control unit through the transmission pin.
Step S905: the control unit 101 decodes and restores the infrared signal after the logic operation, and compares and verifies the decoded and restored infrared signal with the infrared signal received by the first infrared receiver.
Specifically, the process of decoding the infrared signal after the restoration logic operation by the control unit 101 is shown in fig. 8, which is not described herein. The step of comparing and verifying the decoded and restored infrared signal with the infrared signal received by the first infrared receiver specifically comprises the following steps:
judging whether the infrared signal received by the first infrared receiver is the same as the infrared signal received by the second infrared receiver;
when the infrared signal received by the first infrared receiver is the same as the infrared signal received by the second infrared receiver, the first receiver and the second receiver are determined to work normally.
Compared with the prior art, the infrared identification device and the method thereof provided by the embodiment of the invention have the advantages that the infrared signals are received through the first infrared receiver and transmitted to the control unit, the infrared signals are received through the second infrared receiver and transmitted to the infrared converter, the infrared converter temporarily delays the infrared signals received by the second infrared receiver and transmits the infrared signals to the control unit after logic operation, the control unit decodes and restores the infrared signals after logic operation, and the decoded and restored infrared signals are verified with the infrared signals received by the first infrared receiver, so that whether the first infrared receiver and the second infrared receiver can work normally is determined.
It will be appreciated by persons skilled in the art that the above embodiments have been provided for the purpose of illustrating the invention and are not to be construed as limiting the invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.
Claims (8)
1. The utility model provides an infrared identification device, is applicable to the function of verification first infrared receiver and second infrared receiver, first infrared receiver with the second infrared receiver is used for receiving infrared signal, first infrared receiver with the infrared signal that the second infrared receiver received is the same infrared signal at same moment, its characterized in that includes:
the control unit is electrically connected with the first infrared receiver and is used for receiving the infrared signals received by the first infrared receiver;
the infrared converter is electrically connected with the second infrared receiver and is used for receiving the infrared signals received by the second infrared receiver, temporarily delaying the infrared signals received by the second infrared receiver, carrying out logic operation on the infrared signals and then transmitting the logic operation to the control unit;
the control unit is also used for decoding and restoring the infrared signals after logic operation, comparing and verifying the decoded and restored infrared signals with the infrared signals received by the first infrared receiver, and outputting verification signals according to verification results; wherein the method comprises the steps of
The infrared converter includes:
the temporary storage delay unit is electrically connected with the second infrared receiver and is used for temporarily storing and delaying outputting the infrared signals received by the second infrared receiver;
a waveform generator for generating a MASK signal;
the logic unit is electrically connected with the second infrared receiver and the waveform generator and is used for outputting the infrared signals received by the second infrared receiver and the MASK signal phase to the control unit.
2. The infrared recognition device according to claim 1, wherein the control unit is further configured to determine whether the infrared signal received by the first infrared receiver is identical to the infrared signal received by the second infrared receiver; a kind of electronic device with high-pressure air-conditioning system
When the infrared signal received by the first infrared receiver is the same as the infrared signal received by the second infrared receiver, outputting a first verification signal to determine that the first infrared receiver and the second infrared receiver can work normally;
when the infrared signal received by the first infrared receiver is different from the infrared signal received by the second infrared receiver, outputting a second verification signal to determine that the first infrared receiver and the second infrared receiver cannot work normally.
3. The infrared recognition device according to claim 1, wherein the infrared converter includes a transmission pin for judging whether the line has signal transmission, and when it is determined that the line has no signal transmission, the infrared converter transmits the logically operated infrared signal to the control unit through the transmission pin.
4. The infrared light identification apparatus of claim 3, wherein the transmission protocol of the infrared signal is a NEC protocol, and the waveform generator is further configured to generate the MASK signal according to the NEC protocol, so that the infrared signal after the logic operation can be decoded and restored.
5. An infrared identification method is applied to an infrared identification device, the infrared identification device comprises a first infrared receiver, a control unit, a second infrared receiver and an infrared converter, the infrared signals received by the first infrared receiver and the second infrared receiver are the same infrared signals at the same time, and the infrared identification method comprises the following steps:
the first infrared receiver receives an infrared signal and sends the infrared signal to the control unit;
the second infrared receiver receives the infrared signal and sends the infrared signal to the infrared converter;
the infrared converter temporarily stores, delays and logically operates the infrared signal received by the second infrared receiver;
the infrared converter sends infrared signals subjected to logic operation to the control unit;
the control unit decodes and restores the infrared signals after logic operation, and compares and verifies the decoded and restored infrared signals with the infrared signals received by the first infrared receiver; the infrared converter comprises a temporary storage delay unit, a waveform generator and a logic unit, and the infrared converter carries out temporary storage delay and logic operation on the infrared signal received by the second infrared receiver, and specifically comprises the following steps:
the temporary storage delay unit temporarily stores and delays outputting the infrared signal received by the second infrared receiver;
the waveform generation unit generates a MASK signal;
and the logic operation unit outputs the infrared signal received by the second infrared receiver and the MASK signal phase to the control unit.
6. The method of claim 5, wherein the step of comparing the decoded and recovered infrared signal with the infrared signal received by the first infrared receiver comprises the steps of:
judging whether the infrared signal received by the first infrared receiver is the same as the infrared signal received by the second infrared receiver;
when the infrared signal received by the first infrared receiver is the same as the infrared signal received by the second infrared receiver, the first infrared receiver and the second infrared receiver are determined to work normally.
7. The infrared recognition method according to claim 5, wherein the infrared converter includes a transmission pin, and the infrared converter transmits the infrared signal subjected to the logic operation to the control unit, specifically comprising the steps of:
the transmission pin judges whether the line has signal transmission or not;
and when no signal transmission is determined on the line, the infrared converter transmits the infrared signal subjected to logic operation to the control unit through the transmission pin.
8. The infrared recognition method as set forth in claim 7, wherein the transmission protocol of the infrared signal is NEC protocol, and the step of generating MASK signal by the waveform generating unit comprises:
and generating the MASK signal according to the NEC protocol, so that the infrared signal subjected to logic operation can be decoded and restored.
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| CN202010753583.0A CN114071202B (en) | 2020-07-30 | 2020-07-30 | Infrared identification device and method thereof |
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| CN202010753583.0A CN114071202B (en) | 2020-07-30 | 2020-07-30 | Infrared identification device and method thereof |
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