Title: Theory / Unimportant / CS / Algo / Graphics / Fundamentals -Shirley Marschner{ / 09 Signal processing
Tags: récupéré

Name: Samples of \(f\)
Definition: Saving the value of \(f\) at many different points.
Page: 185
Chapter: 9
Variables: \(f\) a function
Context: Signal processing
Example: Picture
Example2: Mouse motion
Example3: Motion capture system
Example4: Digital audio

Name: Aliasing
Definition: The default which appear when some picture is badly scalled
Page: 186
Chapter: 9

Name: Sound
Definition: Pressure wave in the air
Page: 187
Chapter: 9
Section: 1

Name: Analog-to-digital convertor
Definition: Some thing which measure the voltage many thousand times per second, generating a stream of integers
Page: 187
Chapter: 9
Section: 1
Abbreviation: ADC

Name: digital-to-analog convertor
Definition: something which produces a voltage according to the numbers it receives
Page: 187
Chapter: 9
Section: 1
Abbreviation: DAC

Question: Using ADC and then DAC, the quality of the reproduction depends on
Answer: the number of measurement by second
Page: 187
Chapter: 9
Section: 1
Answer2: the highest pitch which must be recorded

Name: undersampling artifact
Definition: A default due to the fact that the sample was not dense enough
Page: 187
Chapter: 9
Section: 1

Question: How to avoid undersampling artifact
Answer: using filter to avoir recording high-pitched sound
Page: 187
Chapter: 9
Section: 1

Question: How to avoid reconstructing artifact
Answer: filtering DAC's output to smooth out the waveform
Page: 187
Chapter: 9
Section: 1

Name: reconstructing artifact
Definition: Artifact due to the DAC output.
Page: 187
Chapter: 9
Section: 1
Example: Speaker does not move between two output. This create high-frequency buzzing sound