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2014/10/15 ¤U¤È 10:13:38

iphone Programming Glossary: sampled

Optimizing a drawing (with finger touches) application for iPhone SDK

http://stackoverflow.com/questions/1123306/optimizing-a-drawing-with-finger-touches-application-for-iphone-sdk

With two points draw a straight line with three or more draw a curve. You can re start the process when two points are sampled that lie within a defined distance. This would allow you to draw two arcs like a 'm' in one motion you naturally pause in..

AurioTouch & FFT for an instrument tuner

http://stackoverflow.com/questions/1447059/auriotouch-fft-for-an-instrument-tuner

bins and the bin frequency width is based on the FFT parameters. To find a frequency you will need to record it sampled at a rate at least twice the highest frequency present in the sample. Then find the time between the cycles. If it is not..

Network Activity Monitoring on iPhone

http://stackoverflow.com/questions/19977759/network-activity-monitoring-on-iphone

t_rxtshift log 2 of rexmt exp. backoff u_int t_rttmin minimum rtt allowed u_int32_t t_rttupdated number of times rtt sampled u_int32_t max_sndwnd largest window peer has offered int t_softerror possible error not yet reported out of band data char..

Determining the magnitude of a certain frequency on the iPhone

http://stackoverflow.com/questions/2921674/determining-the-magnitude-of-a-certain-frequency-on-the-iphone

all frequencies will map to an integer k. Find the closest k If you need more frequency resolution increase N. Signals sampled at Fs are only able to accurately represent frequencies up to but not including Fs 2 Nyquist rate . This is why I showed..

PCM audio amplitude values?

http://stackoverflow.com/questions/5890499/pcm-audio-amplitude-values

cause the microphone surface to vibrate as well as in move up and down. When it moves down that might be measured or sampled a positive value. When it moves up that might be sampled as a negative value. Or it could be the opposite. When you stop.. up and down. When it moves down that might be measured or sampled a positive value. When it moves up that might be sampled as a negative value. Or it could be the opposite. When you stop talking the surface settles back down to the zero position...