corresponds to a polynomial of X6 + X4 + X2 + x + 1, while a polynomial of code 101111 corresponds to X5 + X3 + X2 + x + 1.CRC verification is divided into many different standards based on the generated polynomials used. Common include:Example of name generation Polynomial
CRC-4 X4 + x + 1 3 ITU g.704
CRC-8 X8 + X5 + X4 + 1 31 DS18B20CRC-12 X12 + X11 + X3 + X2 + x + 1 0x80fCRC-16 x16 + x15 + X2 + 1 0x8005 IBM SDLCCRC-ITU (CCITT) x16 +
0 or 1
Time Limit: 4000/2000 MS (Java/others) memory limit: 32768/32768 K (Java/Others)Total submission (s): 692 accepted submission (s): 185 Problem descriptiongiven a n * n matrix CIJ (1
Besides, Xij meets the following conditions:
1. X12 + x13 +... x1n = 12. x1n + x2n +... Xn-1n = 13. For each I (1
For example, if n = 4, we can get the following running ity:
X12 + x13 + x14 = 1X14 + x24 + x34
0 or 1Time limit:4000/2000 MS (java/others) Memory limit:32768/32768 K (java/others)Total submission (s): 1421 Accepted Submission (s): 388Problem Descriptiongiven a n*n matrix Cij (1Besides,xij meets the following conditions:1.x12+x13+ ... X1n=12.x1n+x2n+ ... Xn-1n=13.for each I (1For example, if N=4,we can get the following equality:X12+x13+x14=1X14+x24+x34=1x12+x22+x32+x42=x21+x22+x23+x24X13+x23+x33+x43=x31+x32+x33+x34Now, we want to know the minim
first to adjust to 512 (of course, can be higher)Most laptops don't have this option, so they don't have to be adjusted.Start the adjustment, first open the terminal (do not know where the terminal, please search by yourself)Enter the following line, to the FB drive insidecd/s*/l*/ext*/appleintelsnbgraphicsfb.kext/c*/m*Back up the drive.sudo cp APPLEINTELSNBGRAPHICSFB Appleintelsnbgraphicsfb.backupThis driver has the machine code that determines the memory, but the difference between 32-bit and
The current wireless technology is dazzling and overwhelmed. Various wireless technologies have their own unique advantages and adapt to different environments to meet different needs. The following describes several mainstream wireless technologies.
FM of mainstream wireless technologies
Speaking of FM Wireless Technology, this may be one of the most mature wireless technologies with the widest application scope and the lowest cost. Your radio is the simplest FM Wireless Receiving device; some
decoder converts digital signals into analog signals, and the power amplifier scales up analog signals, at last, the speaker (passive) converts the enlarged analog signal to a sonic stream for playback.
For portable hifi, it is impossible to create too much because of portability limitations. in the current development, there are two parts: audio source and speaker. the audio source here is actually a small all-in-one machine, which includes audio sources, decoder and power amplifier, while t
Audio output as a hardware resource is unique for iOS systems, so how do you reconcile and hold relationships between apps for this scarce hardware?The solution given by iOS is "avaudiosession", which enables control over the current context audio resources of the app, such asPlug and unplug headphones, answer phones, and mix audio data. When you encounter:
Is it a recording or a play?
How do I behave when the system mute key is pressed?
Cause analysis
In this case, you can go to the Apple Store to consult, and if it is like you said that the situation there are two kinds of headphones bad contact, or a problem with the headphone hole, the former can try to plug headphones into the headset, while playing music, twisting plug into the headphone hole connector. If the problem is the latter, please go to the professional repair shop for maint
Apple is finally officially on the Airpods wireless headset, but do you know how to recharge it and connect it with the iphone? We gave you a tutorial to help you use headphones faster and better.
Connect Airpods to the iphone
Click the home button to unlock your iphone
2– Open the Airpods headphone box and close the headset to the iphone
A set animation appears on the 3–iphone screen
4– Click "Connect" and click "Finish"
If you want to conn
sound ring stores kinetic energy. The single-element smoothness of headphones is equivalent to the parallel value of the two capacitors of the shock film and sound ring, which is the key to determining the sound quality. The materials used by the shock film and sound ring are high-shun materials. The internal molecular structure of the shock film is unstable at the initial stage, so the smoothness is unstable, when switching to a speaker unit, its sm
Based on Android 4.4 and 4.2, codec used for detection is wm8994.
The mic detection in Android and Kernel is based on the headset detection. The specific process is as follows:
1) kernel uses Jack to detect pin interruption and detects that headphones are inserted.
2) read the codec register to determine whether the headset has mic
3) notify the Android upper layer through the InputEvent/UEvent Mechanism
For more information, see my previous article o
The iphone's headset is called Earpod, and the sound is good. However, a lot of users have found that the iphone headset computer can not be used, plugged into the computer after either the sound is paste, or listen to the song when simply accompaniment, the human voice is very small. Why can't an iphone headset work on a computer?
It's not because your headphones are broken, it's just a normal state of the IPhone6 headset. It is worth mentio
computer with audio devices such as sound cards, microphones, headphones, or speakers. More than 128MB of memory and the minimum 33.6Kbps rate of Internet access.
The installation of the software is very simple, you just follow the instructions of the Installation Wizard, you can click "Next" to complete the installation. The default software will run automatically when the installation is complete. First use will open the Create Account dialog box
Many users who use the MacBook have encountered internal speaker failure, and the MacBook's built-in speaker fails, and its headphone holes will also light up red, as shown in the following figure. So what causes the MacBook's headphones to Kong Liang the red light? What should I do if the MacBook speaker doesn't sound? Here's a look at the solutions offered by users:
To solve this problem, we have to consider two kinds of situ
feel afraid!
Common mistake three: the IPhone can't use Android headphones!
Believe that a lot of people in the purchase of headphones will see the "ios version of" or "android version", so that you subconsciously think that "iphone and Android headphones can not be exchanged use. In fact, this sentence is only half right. Because IOS can connect t
Many friends of the PC are installed every day beautiful bar, in every day in the sound can be set in the PC audio equalizer to make music more in line with their taste, using this method than the online recommended music mode is better to listen to more, but many small partners do not know how to set, the following small series to everyone detailed introduction to set the method, Hope to be able to help everyone.
How to set the Equalizer in PC:
In the state of heavy bass added dance effec
---- 1110 1011 ----- 1010 1011 ----- 0010 0000 ---- 010
Therefore, T (x) = (x6+x5) + (x) =x6+x5+x, i.e. 1100000+010=1100010
If the transmission is correct,
T(x) x6+x5+x ------ = --------- = x3+x2+x, G(x) x3+x+1
No formula. Looking back at the vertical division above, if the divisor is 1100010, obviously in the third 1 o'clock of the business, can be done.
The above calculation process helps us to understand the CRC concept. But direct programming to achieve the above algorithm, not onl
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