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Questions tagged [parity]

A parity bit, or check bit, is a bit that is added to ensure that the number of bits with the value one in a set of bits is even or odd. Parity bits are used as the simplest form of error detecting code.

A parity bit, or check bit, is a bit that is added to ensure that the number of bits with the value one in a set of bits is even or odd. Parity bits are used as the simplest form of error detecting code.

There are two variants of parity bits: even parity bit and odd parity bit. In case of even parity, the parity bit is set to 1, if the number of ones in a given set of bits (not including the parity bit) is odd, making the number of ones in the entire set of bits (including the parity bit) even. If the number of ones in a given set of bits is already even, it is set to a 0. When using odd parity, the parity bit is set to 1 if the number of ones in a given set of bits (not including the parity bit) is even, keeping the number of ones in the entire set of bits (including the parity bit) odd. when the number of set bits is odd, then the odd parity bit is set to 0.[1]

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Why is transaction marked as invalid?

I am trying to create a transaction by sending 1 ether from one account to another. Currently, I'm running a local fully-synched parity node. It's running on the Volta test network of EWF (Energy Web Foundation). It's actually possible connecting to…
keremistan
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In a Substrate runtime module how do I compare an input hash to a known default hash value?

I am trying to compare an unknown input_hash with a default_hash_value which my runtime is aware of. The default_hash_value in hex is 5198bfa9da6f9c9d22dd2b0ce301dde9fd3c5826a117705d3ffa415d83a6bde8 generated using Blake2 hashing algorithm from a…
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accessing every nth element in array (hamming code)

So basically I'm creating a program that prompts the user to enter a character like 'A' and it returns their binary value according to the ASCII chart which in this case is 01000001. What should be outputted is a 12-bit hamming code sequence with 8…
Nicepeach
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How does this code calculate the parity of a number?

So I am supposed to find the parity of a number where parity is odd if there are odd number of set bits in the binary representation of the given number and even otherwise. I have a solution but the code is not very understandable and thus am…
Golovkin
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Whether the `odd-even check` only can check the data correctness within limits?

The length of DES arithmetic Secret Key is 64 bit, the valid secret key length is 56, the other 8 bit use as odd-even check. I have a question, whether the odd-even check only can check the data correctness within limits? such as the quote, I use…
aircraft
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Using a formula to decode hamming code(7,4)

At the moment I am trying to come up with a formula decoding Hamming(7,4). Until now not a single one gave me consistent right solutions. I've googled a lot, but cannot find the right information. My implementation uses different parity and data…
MrEmper
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How to calculate Hamming code without converting to binary string?

I am trying to solve a problem that comes down to finding the hamming code without using binary string of the long number in java. I don't understand how we can do that, I have searched at many places like the wikipedia explanation and this one I…
Panda
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Does own node run faster than Infura?

Will I feel the big difference if I will raise own node on a powerful server with good internet 100Mbps+ ??? Did someone experiment with the speed of own node and Infura?
Руслан Миров
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If there is a carry out from msb of the result or an overflow? Will that bit be part of the counting for parity flag?

I want to know how to count the 1's in a result to know the parity flag in assembly. For example: MOV AL, 0xFF MOV BL, 0x01 ADD AL, BL So the answer here in bits is 1 0000 0000, but in my professor's reviewer the parity flag = 1 so i assume…
Russ Henson
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Connecting to Parity running on AWS using websocket?

I am running a parity node on "AWS EC2" instance. I need to connect to this parity node remotely using web-socket provider at port 8546. But I am not able to connect to it remotely, though it is working fine when I run the script within the ec2…
Hsn
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What is the correct parity for this bit sequence?

I have the following bit sequence and I am trying to determine it's parity but I am insure of the answer. 1010101010101011 Since the number of 1's is 9, can I assume that the parity is odd?
Pedro Unas
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PARITY_NONE a keyword in C++ Windows?

I am writing a serial library using boost and I have an enum: enum parity_t { PARITY_NONE, PARITY_ODD, PARITY_EVEN }; I get errors like: Error 1 error C2059: syntax error : '(' I couldn't figure out what the issue was. Then my friend and I…
wjwwood
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How to encode in ASCII with parity

The following question if from an old exam paper on computer organization. "How many bits are needed to encode a typical textbook in ASCII with parity. How many CDROMs and how many DVDs are needed to store a library with 1 million book? Let us…
Tightrope
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Difference between JP and JPE or JNP and JPO in Assembly language

This question is about Parity Flag. I cannot figure out the difference between JP and JPE or JNP and JPO. Did it just another name for each one or it did have some differnce?
vio1etus
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Cross Platform CRC8 Function: C++ and Python Parity Check

Cyclic redundancy checks (CRCs) can be used to check whether data quality is maintained during transmission. This can be helpful both for serial transfer and for radio transmission. Typically, the complexity can be taken out of this, simply by…
Triz
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