The reason this works is related to a concept called parity.

这样做的原因与称为奇偶校验的概念有关。

In our example, this adds up to a checksum of 364.

在我们的示例中，这加起来的校验和为 364。

Grid parity is understood as that line, that threshold, below which renewable electricity is cheaper than electricity from burning fossil fuels.

网格奇偶校验被理解为一条条线，一个阈值，低于这个标准，可再生能源发电比化石燃料发电便宜。

UDP headers also include something called a checksum, which allows the data to be verified for correctness.

UDP 标头还包括一种称为校验和的东西，验证数据的正确性。

In UDP, the checksum value is stored in 16 bits.

在 UDP 中，校验和值以 16 存储。

Within this system, we handle business checks, limit control, fee calculation, state machine control, and event messaging logic.

该系统内，我们处理业务校验、限额控、计算、状态机控及事件消息逻辑。

If that sum is the same as the checksum sent in the header, all is well.

如果该和与标头中发送的校验和相同，则一切正常。

That signal, then, is all tied up in the comment I made about parity violation earlier—in self-analyzing spin, I said.

这个信号，然后，都与我之前关于奇偶校验违反的评论有关——在自我分析中，我说。

And this special bit that the sender uses to control the parity is called a " parity bit" .

发送方来控奇偶校验的这个特殊称为“奇偶校验”。

And actually, we should be clear, if the receiver sees an odd parity, it doesn't necessarily mean there was just 1 error.

实际上，我们应该清楚， 如果接收器看到奇数奇偶校验，并不一定意味着只有 1 个错误。

So when we do our four parity checks, and we see that they're all even, it unambiguously means that there is no error.

因此，当我们进行四次奇偶校验时，我们发现们都是偶数， 这明确意味着没有错误。

And remember, each question requires giving up only a single bit to set the appropriate parity check.

请记住，每个问题只需要放弃一即可设置适当的奇偶校验。

If you're wondering what happens if a parity bit itself gets affected… well you can just try it.

如果您想知道如果奇偶校验本身受到影响会发生什么… … 那么您可以尝试一下。

If we use it as a parity bit across the whole block, it lets us actually detect, even though we can't correct, 2-bit errors.

如果我们将作整个块的奇偶校验，即使我们无法纠正，也可以让我们实际检测到 2 错误。

In the jargon, whether a group of bits has an even or odd number of 1's is known as its " parity" .

行话来说，一组中 1 的个数是偶数还是奇数被称为其“奇偶校验”。

For example, let's say we do a parity check on just these 8 bits, all the odd-numbered positions.

例如，假设我们仅对这 8 （所有奇数置）进行奇偶校验。

Before the packet is sent, the transmitting computer calculates the checksum by adding all the data together: 89 plus 111 plus 33 and so on.

在发送数据包之前，发送计算机通过将所有数据相加来计算校验和：89 加 111 加 33 等等。

So if they notice an even parity overall, but something nonzero happening with the other checks, it tells them there were at least two errors.

因此， 如果他们注意到整体奇偶校验，但其他检查发生非零的情况，则告诉他们至少存在两个错误。

Phrased differently, it's the parity of these two bits.

换句话说，是这两个的奇偶校验。

After setting those four special error-correcting bits, we set that 0th bit so that the parity of the full block is even, just like a normal parity check.

设置完这四个特殊的纠错后，我们设置第 0 ， 以便整个块的奇偶校验是偶数，就像正常的奇偶校验一样。