Page 24 - C:\Users\msi\OneDrive\Documents\Flip PDF Corporate Edition\E-Commerce\

Cropping
To remove some parts of the image and to put the rest of the image as the
subset of the old image.

Rotation
Image could be rotated at any degree for displaying it in different angles.

Digital Voice and Audio

Digital Audio
Sound is made up of continuous analog sine waves that tend to repeat depending
on the music or voice. The analog waveforms are converted into digital fornlat
by analog-to-digital converter (ADC) using sampling process.

Sampling Process
Sampling is a process where the analog signal is sampled over time at regular
intervals to obtain the amplitude of the analog signal at the sampling time.
Sampling rate The regular interval at which the sampling occurs is called the
sampling rate.

Digital Voice
Speech is analog in nature and is cOl1veli to digital form by an analog-to-digital
converter (ADC). An ADC takes an input signal from a microphone and converts
the amplitude of the sampled analog signal to an 8-, 16- or 32-bit digital value.

The four important factors governing the ADC process are:

• Sampling rate
• Resolution
• Linearity and
• Conversion speed.

Sampling Rate: The rate at which the ADC takes a sample of an analog signal.
Resolution: The number of bits utilized for conversion determines the resolution
of ADC.

Linearity: Linearity implies that the sampling is linear at all frequencies and that
the amplitude tally represents the signal.

Conversion Speed: It is a speed of ADC to convert the analog signal into Digital
signals. It must be fast
enough.