What's the name of signal encoding used by WS2812 LEDs? [duplicate]
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This question already has an answer here:
What encoding is used in this signal?
4 answers
The WS2812b color LED uses some kind of duty cycle encoding to encode three states:
- one
- zero
- reset
This can be seen in the following figure:
(Source: https://cpldcpu.files.wordpress.com/2014/01/ws2812_protocol.png)
What's the name of the used encoding?
It's not classic Pulse Width Modulation (PWM).
Edit:
While this question What encoding is used in this signal? asks for a name of a similar modulation, it does not give a name for the modulation.
modulation digital-modulation ws2812b
asked Nov 25 at 17:56
Paebbels
3,1412933
marked as duplicate by Ale..chenski, old_timer, Elliot Alderson, Dmitry Grigoryev, Finbarr Nov 26 at 12:42
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
add a comment |
up vote
1
down vote
favorite
This question already has an answer here:
What encoding is used in this signal?
4 answers
The WS2812b color LED uses some kind of duty cycle encoding to encode three states:
- one
- zero
- reset
This can be seen in the following figure:
(Source: https://cpldcpu.files.wordpress.com/2014/01/ws2812_protocol.png)
What's the name of the used encoding?
It's not classic Pulse Width Modulation (PWM).
Edit:
While this question What encoding is used in this signal? asks for a name of a similar modulation, it does not give a name for the modulation.
modulation digital-modulation ws2812b
asked Nov 25 at 17:56
Paebbels
3,1412933
marked as duplicate by Ale..chenski, old_timer, Elliot Alderson, Dmitry Grigoryev, Finbarr Nov 26 at 12:42
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
Looks to be just a made up one. Not unusual to have a sync pattern then some data. You see similar ones used elsewhere, not having a global name either.
– old_timer
Nov 25 at 19:47
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
This question already has an answer here:
What encoding is used in this signal?
4 answers
The WS2812b color LED uses some kind of duty cycle encoding to encode three states:
- one
- zero
- reset
This can be seen in the following figure:
(Source: https://cpldcpu.files.wordpress.com/2014/01/ws2812_protocol.png)
What's the name of the used encoding?
It's not classic Pulse Width Modulation (PWM).
Edit:
While this question What encoding is used in this signal? asks for a name of a similar modulation, it does not give a name for the modulation.
modulation digital-modulation ws2812b
asked Nov 25 at 17:56
Paebbels
3,1412933
This question already has an answer here:
What encoding is used in this signal?
4 answers
The WS2812b color LED uses some kind of duty cycle encoding to encode three states:
- one
- zero
- reset
This can be seen in the following figure:
(Source: https://cpldcpu.files.wordpress.com/2014/01/ws2812_protocol.png)
What's the name of the used encoding?
It's not classic Pulse Width Modulation (PWM).
Edit:
While this question What encoding is used in this signal? asks for a name of a similar modulation, it does not give a name for the modulation.
This question already has an answer here:
What encoding is used in this signal?
4 answers
modulation digital-modulation ws2812b
modulation digital-modulation ws2812b
asked Nov 25 at 17:56
Paebbels
3,1412933
asked Nov 25 at 17:56
Paebbels
3,1412933
edited Nov 25 at 21:51
asked Nov 25 at 17:56
Paebbels
3,1412933
asked Nov 25 at 17:56
Paebbels
3,1412933
asked Nov 25 at 17:56
Paebbels
3,1412933
3,1412933
marked as duplicate by Ale..chenski, old_timer, Elliot Alderson, Dmitry Grigoryev, Finbarr Nov 26 at 12:42
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
marked as duplicate by Ale..chenski, old_timer, Elliot Alderson, Dmitry Grigoryev, Finbarr Nov 26 at 12:42
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
Looks to be just a made up one. Not unusual to have a sync pattern then some data. You see similar ones used elsewhere, not having a global name either.
– old_timer
Nov 25 at 19:47
add a comment |
Looks to be just a made up one. Not unusual to have a sync pattern then some data. You see similar ones used elsewhere, not having a global name either.
– old_timer
Nov 25 at 19:47
Looks to be just a made up one. Not unusual to have a sync pattern then some data. You see similar ones used elsewhere, not having a global name either.
– old_timer
Nov 25 at 19:47
Looks to be just a made up one. Not unusual to have a sync pattern then some data. You see similar ones used elsewhere, not having a global name either.
– old_timer
Nov 25 at 19:47
add a comment |
2 Answers
2
active
oldest
votes
up vote
5
down vote
AFAIK it doesn't have a fixed name, apart from 'the WS2812 protocol'. As described, it is a fixed-cell pulse-width encoding.
FYI: in practice, it isn't fixed-cell at all: provided that the pauses (T1L, T0L) are shorter than Treset, all that matters is the pulse width (T0H, T1H). This makes it a plain pulse-wdith encoding, and it makes bit-banging waaaaay easier.
answered Nov 25 at 18:02
Wouter van Ooijen
44.1k150117
This looks like a variant of 1-wire protocol encoding scheme, also referred as "PWM", in this case it looks like 33/66% PWM. The protocol was invented by Dallas Semiconductor, now a part of MAXIM. home.roboticlab.eu/en/examples/sensor/1-wire
– Ale..chenski
Nov 25 at 20:36
2
I don't see what this unidirectional protocol has to do with the bi-directional dallas/maxim 1-wire protocol. And IMO PWM is a strange term to describe this protocol, because it isn't a Modulation, it is an Encoding. So yes, it is a pulse-width encodong, just like 1-wire, and dozens of others.
– Wouter van Ooijen
Nov 25 at 20:44
add a comment |
up vote
0
down vote
This is what World-Semi calls it, they make the WS2812B
The data transfer protocol use single NZR communication mode. After the pixel power-on reset, the DIN
port receive data from controller, the first pixel collect initial 24bit data then sent to the internal data latch,
the other data which reshaping by the internal signal reshaping amplification circuit sent to the next cascade
pixel through the DO port. After transmission for each pixel，the signal to reduce 24bit. pixel adopt auto resha
-ping transmit technology, making the pixel cascade number is not limited the signal transmission, only depend
on the speed of signal transmission.
answered Nov 25 at 23:38
CrossRoads
9687
This does not answer my question. I asked for the signal modulation name, but not how communication works.
– Paebbels
Nov 26 at 0:36
1
The question was "What's the name of the used encoding?" The manufacturer calls it "single NZR communication mode". I think that does answer the question.
– CrossRoads
Nov 26 at 1:36
I get your point, but I believe this is a typo. There is noNZRcode (according to Google), butNRZ(Non-Return to Zero`). NRZ is a general term and the basis for many codes.
– Paebbels
Nov 26 at 8:32
Next suggestion would be to browse the Adafruit Neopixel library of the FastLED.h library and see if they call it something else.
– CrossRoads
Nov 26 at 15:27
add a comment |
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
5
down vote
AFAIK it doesn't have a fixed name, apart from 'the WS2812 protocol'. As described, it is a fixed-cell pulse-width encoding.
FYI: in practice, it isn't fixed-cell at all: provided that the pauses (T1L, T0L) are shorter than Treset, all that matters is the pulse width (T0H, T1H). This makes it a plain pulse-wdith encoding, and it makes bit-banging waaaaay easier.
answered Nov 25 at 18:02
Wouter van Ooijen
44.1k150117
This looks like a variant of 1-wire protocol encoding scheme, also referred as "PWM", in this case it looks like 33/66% PWM. The protocol was invented by Dallas Semiconductor, now a part of MAXIM. home.roboticlab.eu/en/examples/sensor/1-wire
– Ale..chenski
Nov 25 at 20:36
2
I don't see what this unidirectional protocol has to do with the bi-directional dallas/maxim 1-wire protocol. And IMO PWM is a strange term to describe this protocol, because it isn't a Modulation, it is an Encoding. So yes, it is a pulse-width encodong, just like 1-wire, and dozens of others.
– Wouter van Ooijen
Nov 25 at 20:44
add a comment |
up vote
5
down vote
AFAIK it doesn't have a fixed name, apart from 'the WS2812 protocol'. As described, it is a fixed-cell pulse-width encoding.
FYI: in practice, it isn't fixed-cell at all: provided that the pauses (T1L, T0L) are shorter than Treset, all that matters is the pulse width (T0H, T1H). This makes it a plain pulse-wdith encoding, and it makes bit-banging waaaaay easier.
answered Nov 25 at 18:02
Wouter van Ooijen
44.1k150117
This looks like a variant of 1-wire protocol encoding scheme, also referred as "PWM", in this case it looks like 33/66% PWM. The protocol was invented by Dallas Semiconductor, now a part of MAXIM. home.roboticlab.eu/en/examples/sensor/1-wire
– Ale..chenski
Nov 25 at 20:36
2
I don't see what this unidirectional protocol has to do with the bi-directional dallas/maxim 1-wire protocol. And IMO PWM is a strange term to describe this protocol, because it isn't a Modulation, it is an Encoding. So yes, it is a pulse-width encodong, just like 1-wire, and dozens of others.
– Wouter van Ooijen
Nov 25 at 20:44
add a comment |
up vote
5
down vote
up vote
5
down vote
AFAIK it doesn't have a fixed name, apart from 'the WS2812 protocol'. As described, it is a fixed-cell pulse-width encoding.
FYI: in practice, it isn't fixed-cell at all: provided that the pauses (T1L, T0L) are shorter than Treset, all that matters is the pulse width (T0H, T1H). This makes it a plain pulse-wdith encoding, and it makes bit-banging waaaaay easier.
answered Nov 25 at 18:02
Wouter van Ooijen
44.1k150117
AFAIK it doesn't have a fixed name, apart from 'the WS2812 protocol'. As described, it is a fixed-cell pulse-width encoding.
FYI: in practice, it isn't fixed-cell at all: provided that the pauses (T1L, T0L) are shorter than Treset, all that matters is the pulse width (T0H, T1H). This makes it a plain pulse-wdith encoding, and it makes bit-banging waaaaay easier.
answered Nov 25 at 18:02
Wouter van Ooijen
44.1k150117
edited Nov 25 at 19:49
answered Nov 25 at 18:02
Wouter van Ooijen
44.1k150117
answered Nov 25 at 18:02
Wouter van Ooijen
44.1k150117
answered Nov 25 at 18:02
Wouter van Ooijen
44.1k150117
44.1k150117
This looks like a variant of 1-wire protocol encoding scheme, also referred as "PWM", in this case it looks like 33/66% PWM. The protocol was invented by Dallas Semiconductor, now a part of MAXIM. home.roboticlab.eu/en/examples/sensor/1-wire
– Ale..chenski
Nov 25 at 20:36
2
I don't see what this unidirectional protocol has to do with the bi-directional dallas/maxim 1-wire protocol. And IMO PWM is a strange term to describe this protocol, because it isn't a Modulation, it is an Encoding. So yes, it is a pulse-width encodong, just like 1-wire, and dozens of others.
– Wouter van Ooijen
Nov 25 at 20:44
add a comment |
This looks like a variant of 1-wire protocol encoding scheme, also referred as "PWM", in this case it looks like 33/66% PWM. The protocol was invented by Dallas Semiconductor, now a part of MAXIM. home.roboticlab.eu/en/examples/sensor/1-wire
– Ale..chenski
Nov 25 at 20:36
2
I don't see what this unidirectional protocol has to do with the bi-directional dallas/maxim 1-wire protocol. And IMO PWM is a strange term to describe this protocol, because it isn't a Modulation, it is an Encoding. So yes, it is a pulse-width encodong, just like 1-wire, and dozens of others.
– Wouter van Ooijen
Nov 25 at 20:44
This looks like a variant of 1-wire protocol encoding scheme, also referred as "PWM", in this case it looks like 33/66% PWM. The protocol was invented by Dallas Semiconductor, now a part of MAXIM. home.roboticlab.eu/en/examples/sensor/1-wire
– Ale..chenski
Nov 25 at 20:36
This looks like a variant of 1-wire protocol encoding scheme, also referred as "PWM", in this case it looks like 33/66% PWM. The protocol was invented by Dallas Semiconductor, now a part of MAXIM. home.roboticlab.eu/en/examples/sensor/1-wire
– Ale..chenski
Nov 25 at 20:36
2
2
I don't see what this unidirectional protocol has to do with the bi-directional dallas/maxim 1-wire protocol. And IMO PWM is a strange term to describe this protocol, because it isn't a Modulation, it is an Encoding. So yes, it is a pulse-width encodong, just like 1-wire, and dozens of others.
– Wouter van Ooijen
Nov 25 at 20:44
I don't see what this unidirectional protocol has to do with the bi-directional dallas/maxim 1-wire protocol. And IMO PWM is a strange term to describe this protocol, because it isn't a Modulation, it is an Encoding. So yes, it is a pulse-width encodong, just like 1-wire, and dozens of others.
– Wouter van Ooijen
Nov 25 at 20:44
add a comment |
up vote
0
down vote
This is what World-Semi calls it, they make the WS2812B
The data transfer protocol use single NZR communication mode. After the pixel power-on reset, the DIN
port receive data from controller, the first pixel collect initial 24bit data then sent to the internal data latch,
the other data which reshaping by the internal signal reshaping amplification circuit sent to the next cascade
pixel through the DO port. After transmission for each pixel，the signal to reduce 24bit. pixel adopt auto resha
-ping transmit technology, making the pixel cascade number is not limited the signal transmission, only depend
on the speed of signal transmission.
answered Nov 25 at 23:38
CrossRoads
9687
This does not answer my question. I asked for the signal modulation name, but not how communication works.
– Paebbels
Nov 26 at 0:36
1
The question was "What's the name of the used encoding?" The manufacturer calls it "single NZR communication mode". I think that does answer the question.
– CrossRoads
Nov 26 at 1:36
I get your point, but I believe this is a typo. There is noNZRcode (according to Google), butNRZ(Non-Return to Zero`). NRZ is a general term and the basis for many codes.
– Paebbels
Nov 26 at 8:32
Next suggestion would be to browse the Adafruit Neopixel library of the FastLED.h library and see if they call it something else.
– CrossRoads
Nov 26 at 15:27
add a comment |
up vote
0
down vote
This is what World-Semi calls it, they make the WS2812B
The data transfer protocol use single NZR communication mode. After the pixel power-on reset, the DIN
port receive data from controller, the first pixel collect initial 24bit data then sent to the internal data latch,
the other data which reshaping by the internal signal reshaping amplification circuit sent to the next cascade
pixel through the DO port. After transmission for each pixel，the signal to reduce 24bit. pixel adopt auto resha
-ping transmit technology, making the pixel cascade number is not limited the signal transmission, only depend
on the speed of signal transmission.
answered Nov 25 at 23:38
CrossRoads
9687
This does not answer my question. I asked for the signal modulation name, but not how communication works.
– Paebbels
Nov 26 at 0:36
1
The question was "What's the name of the used encoding?" The manufacturer calls it "single NZR communication mode". I think that does answer the question.
– CrossRoads
Nov 26 at 1:36
I get your point, but I believe this is a typo. There is noNZRcode (according to Google), butNRZ(Non-Return to Zero`). NRZ is a general term and the basis for many codes.
– Paebbels
Nov 26 at 8:32
Next suggestion would be to browse the Adafruit Neopixel library of the FastLED.h library and see if they call it something else.
– CrossRoads
Nov 26 at 15:27
add a comment |
up vote
0
down vote
up vote
0
down vote
This is what World-Semi calls it, they make the WS2812B
The data transfer protocol use single NZR communication mode. After the pixel power-on reset, the DIN
port receive data from controller, the first pixel collect initial 24bit data then sent to the internal data latch,
the other data which reshaping by the internal signal reshaping amplification circuit sent to the next cascade
pixel through the DO port. After transmission for each pixel，the signal to reduce 24bit. pixel adopt auto resha
-ping transmit technology, making the pixel cascade number is not limited the signal transmission, only depend
on the speed of signal transmission.
answered Nov 25 at 23:38
CrossRoads
9687
This is what World-Semi calls it, they make the WS2812B
The data transfer protocol use single NZR communication mode. After the pixel power-on reset, the DIN
port receive data from controller, the first pixel collect initial 24bit data then sent to the internal data latch,
the other data which reshaping by the internal signal reshaping amplification circuit sent to the next cascade
pixel through the DO port. After transmission for each pixel，the signal to reduce 24bit. pixel adopt auto resha
-ping transmit technology, making the pixel cascade number is not limited the signal transmission, only depend
on the speed of signal transmission.
answered Nov 25 at 23:38
CrossRoads
9687
answered Nov 25 at 23:38
CrossRoads
9687
answered Nov 25 at 23:38
CrossRoads
9687
answered Nov 25 at 23:38
CrossRoads
9687
9687
This does not answer my question. I asked for the signal modulation name, but not how communication works.
– Paebbels
Nov 26 at 0:36
1
The question was "What's the name of the used encoding?" The manufacturer calls it "single NZR communication mode". I think that does answer the question.
– CrossRoads
Nov 26 at 1:36
I get your point, but I believe this is a typo. There is noNZRcode (according to Google), butNRZ(Non-Return to Zero`). NRZ is a general term and the basis for many codes.
– Paebbels
Nov 26 at 8:32
Next suggestion would be to browse the Adafruit Neopixel library of the FastLED.h library and see if they call it something else.
– CrossRoads
Nov 26 at 15:27
add a comment |
This does not answer my question. I asked for the signal modulation name, but not how communication works.
– Paebbels
Nov 26 at 0:36
1
The question was "What's the name of the used encoding?" The manufacturer calls it "single NZR communication mode". I think that does answer the question.
– CrossRoads
Nov 26 at 1:36
I get your point, but I believe this is a typo. There is noNZRcode (according to Google), butNRZ(Non-Return to Zero`). NRZ is a general term and the basis for many codes.
– Paebbels
Nov 26 at 8:32
Next suggestion would be to browse the Adafruit Neopixel library of the FastLED.h library and see if they call it something else.
– CrossRoads
Nov 26 at 15:27
This does not answer my question. I asked for the signal modulation name, but not how communication works.
– Paebbels
Nov 26 at 0:36
This does not answer my question. I asked for the signal modulation name, but not how communication works.
– Paebbels
Nov 26 at 0:36
1
1
The question was "What's the name of the used encoding?" The manufacturer calls it "single NZR communication mode". I think that does answer the question.
– CrossRoads
Nov 26 at 1:36
The question was "What's the name of the used encoding?" The manufacturer calls it "single NZR communication mode". I think that does answer the question.
– CrossRoads
Nov 26 at 1:36
I get your point, but I believe this is a typo. There is no
NZR code (according to Google), but NRZ (Non-Return to Zero`). NRZ is a general term and the basis for many codes.– Paebbels
Nov 26 at 8:32
I get your point, but I believe this is a typo. There is no
NZR code (according to Google), but NRZ (Non-Return to Zero`). NRZ is a general term and the basis for many codes.– Paebbels
Nov 26 at 8:32
Next suggestion would be to browse the Adafruit Neopixel library of the FastLED.h library and see if they call it something else.
– CrossRoads
Nov 26 at 15:27
Next suggestion would be to browse the Adafruit Neopixel library of the FastLED.h library and see if they call it something else.
– CrossRoads
Nov 26 at 15:27
add a comment |
Looks to be just a made up one. Not unusual to have a sync pattern then some data. You see similar ones used elsewhere, not having a global name either.
– old_timer
Nov 25 at 19:47