why P1=D3 D5 D7 ? Solutiion: Plot 7 bits in binary & check in P1 row where is 1 ? its on LSB. So now check that entire LSB column where you find 1 and consider that data bit. ( follow " * " ) P1 0 0 1* P2 0 1 0 D3 0 1 1 * P4 1 0 0 D5 1 0 1* D6 1 1 0 D7 1 1 1* Hence, P1 = D3 D5 D7 and lly for P2, P3. Hope helps you... :)

You don't need to memorise which parity bit checks which data bits. The position of the databits are always the sum of the parity bits. In this case, Databit 3 is equals to parity bit 1 + parity bit 2, 5 = 4 + 1, 6 = 4 +2, 7 = 4 + 2 + 1. With this, we can say that, parity bit 1 checks the following data bits: D3 ( 1 + 2), D5 (1 + 4), D7 (1 + 2 + 4), as they all use 1 to determine the position. Subsequently, P2 also checks D3, P4 also checks D5 and P2 and P4 checks D7.

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We don't have to cram anything out. p1 takes care of data bits which have 1 in rightmost place(i.e lsb) and p2 takes care of data bits which have 1 at second rightmost place after lsb and so on .Also for every r>=2,we have 2^r-1 length code block and length of message data is 2^r-r-1.

Note: The associated data bits for the parity bit are chosen by the parity bit's exponentiation. F.e. P1 = 2^0 = 1, so you check & skip bits always with 1 step. CHECK, SKIP, CHECK, SKIP etc. All your check-bits are the ones that will be used for parity later. F.e. P2 = 2^1 = 2, this would result in CHECK, CHECK, SKIP, SKIP, CHECK, CHECK, SKIP, SKIP etc. F.e. P3 = 2^2 = 4, this would result in 4 times CHECK, 4 times SKIP, 4 times CHECK, 4 times SKIP etc. And the bits that are checked always have to be data bits. Try it with the 7 bit array in the upper right corner of the video. You will see how the associations P1 -> D3,D5,D7 P2 -> D3D6D7 P4-> D5D6D7 are easily made.

Very nice, short, and clear explanation! Well presented too. Watched several videos and that's the best so far. Thank you! No unnecessarily details is what I like the best. :)

hey you are so gooddddd at teaching .Thanks for saving my mid term test... Imagine spending 5 weeks listening to lecture but you cant learn shit.But a 12 minutes video make you undesratnd whole concept :D

very clear explanation..thanks a lot Neso Academy, your lectures are great !!!!!

ur videos are unique and easy to understand do u have have any videos on circular , bch , linear codes ? pl reply btw ur videos are amazing

what is the general rule of p1 ,p2 etc dependance on D respectively

Great Lecture..explained so easily!!

Beautifully delivered!

such a wonderful explanation. I am greatly benefited.

thank you! You are very clear! Is there any rule to determine which data bits are controlled by parity bits?

wanna ask that, is parity bits also can get errors like data bits

very very helpful and simple 👌 thank you 😇

Thanks bro.... simple and informative 🙂

Thanks sir!! It's really helpful.. I think our hardware teacher must watch this video before giving that boring lecture to us !! anyway free of worry after watching your video!! Thanks Once again sir!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

thank you! this helped me so much!

When should the generating matrix be used to perform the encoding then?

Sir , can you tell me any of the book name where you have studied this method of hamming code, this will really help me a lot.

i love Neso Academy Videos of Digital electronics as well as of networking concepts :*

what if the transmitter transmitted a bad parity bit but the data bits are correct? Isn't this a flaw to the algorithm?

Sir which board is better for delivering the online lecture through wacom tab which i am using now.

What if parity bits are effected by noise.....

For (8 bit data ) how many parity bits are required? how?

parity bits are introduced counting from left to right or right to left ??

Why P1 is associated with D3D5D7 only

Can noise cause any change to the parity bits?

how parity bits value depends on D3 D5 D7?

sir how to check that parity pit depends on which bits?? eg: for 11 bit codes what should be the dependency of parity and data bits?

Such a great lecture!!!

Do you have lecture of DIJKSTRA's algorithm?

superb, It Helped a lot for my exams.THANK U

Sir your intro music is so awesome

What is the formula used to determine exact value of p1 and p2

Can you please provide the link for control systems

best video on this topic!! thanks sir!

can i know what is advantages n disadvantages of hamming code???

Finally someone that will take criticism and help save their failing restaurant

Really Nice explanation. Understood better than college professor.

how is P1 related to d3 ,d5 and d7 ?

Sir ye corrected hamming code aaya isme to parity bits and apna original data means data bit hain. Then kya hum corrected hamming code me in data bit ko separate as a answer likh sakte hain

sir please upload MEMORY DEVICES(rom, prom, ram &pram) lecture.

Sir why didn,t we take D5 as a parity bit in case of P2 ?

Excellent work Brother.

Clear and concise, thank you very much.

Position 1: check 1 bit, skip 1 bit, check 1 bit, skip 1 bit, etc. (1,3,5,7,9,11,13,15,...) Position 2 : check 2 bits, skip 2 bits, check 2 bits, skip 2 bits, etc(2,3,6,7,10,11,14,15,...) Position 4 : check 4 bits, skip 4 bits, check 4 bits, skip 4 bits, etc(4,5,6,7,12,13,14,15....) Position 8: check 8 bits, skip 8 bits, check 8 bits, skip 8 bits, etc. (8-15,24-31,40-47,...)

very helpful video! thank you so much!

What will happen if more than one bit will change???

sir plz tell me how can we calculate the no of parity bits to

SIR NOT ONLY YOUR VIDEOS BUT ALSO COMMENTS UNDER THEM MAKE US LEARN

first part of this tutorial missing

what if the parity changes the value due to transmission rather than the 4 bits?

Is there a chance of addition of noise to parity bit?

Sir please tell me how to determine p1 ,p2,p4

i was given a question without starting if its odd or even parity. the question is the decoder receives the code word r=1101101. determine whether an error has occurred and if so correct it. thats the question

this is incomplete explanation what if parity bit changed due to noise? correct data will be interpreted wrong?

Q: - 00111101010 What are the values of Parity Bits? Like in video you said: P1=D3, D5, D7

good job.. thanks a lot... Good Explanation

Thank for your videos

my doubt is that if parity bit p1 and p2 changes such that the final parity remains same then how are we going to detect error?

thanx dude ... it was really helpful

Should the numbering be from right to left always? If we numering from left to right, we get another results

thank you sir

in odd parity what will be the contradiction

Superb video ..fully explained..

Sir,does parity bits does not chage due to noise?

how to know P1 is dependent on D3 D5 D7 WHY NOT D6. PLEASE EXPLAIN

What if due to noise the parity bit only gets changed? Do we have any solution for this case also?

Great job. Thank you.

thank u for good explanation .

how can the receiver send any signal........as u said in this video but in the previous one u said tansmitter send the signal

Thank You!

Nice Approach Please please explain the scenario what will happen if the parity bit is changed?

what if there is an error in the parity bit?

thank you very much

And what if the noise is added to the parity bit itself? Then will it not result in unwanted modification in the original signal?

How we will find the errors if data bit and parity bit both will change..??How we can identify them??

When they uploaded this video, I was in sixth standard and now I am Btech first year student seeing their video.

Thank you sir...

The selection of the parity bits value is always depedent on the even parity ? Because on this example the sir wants to make an even parity.

8:32 when do you choose even or odd parity? or why did you choose even parity?

Thank you. So actually Mr Hamming was splitting the code to even and odd packet numbers and expects even and odd to the other side? And what if the parity code had noise and was transmitted faulty ?

very thank you sir

What if the parity bit will be error in the received signal

sir ...i take the different value of p1 p2 p3 that then the parity value will be change..

Thank you so much sir

What if the error itself is in the parity bits?

great video, thanks

your explanation is good! so please help me in keeping 15 bit hamming code generator circuit diagram and explanation :)

How one can exactly know about Which bit has error? Rather than the group of bits??

very helpful ,thanks a lot😇

how to detect error in 9 and 11 bit hamming code????

good explanation !

Sir I've a query that in book I read that those codes having minimum distance 1 can't detect error and also can't correct errors bt at the same time there has been taken an example that 8421 code detects error and also correct the errors so how is it possible bcz 8421 having minimum distance of 1

Great video! Thanks

how the parity bits p1 is dependent on d3 d5 and d7 p2 and p4 on other . how to know this plz tell me

what if the parity bit also gets distorted?

Sir does noise dont add with the position of parity bit