NPA Digital Media (L5) - Audio and Video film formats

Converts them to light signals

Converts them to electrical signals

Stores them as digital files

Amplifies them without conversion

To reduce file size.

To convert sound waves into a format that can be processed by digital devices.

To improve sound quality.

To encrypt the sound data.

Higher frequency results in lower pitch

Higher frequency results in higher pitch

Frequency has no effect on pitch

Frequency is unrelated to sound

Distance between two identical points on waves

Distance between the peak and trough

Distance between two different waves

Distance between the amplitude and node

Higher amplitude means softer sound

Higher amplitude means louder sound

Amplitude has no effect on sound

Amplitude is unrelated to sound

To convert analogue signals to digital signals

To amplify the digital audio

To convert digital numbers back to an analogue wave

To store audio data

An example of lossless compression is a .jpg file

Lossless uses inexact approximations while lossy does not·

You can completely reconstruct lossless but not lossy compression ·

You can completely reconstruct lossy but not lossless compression

MP3

WAV

AAC

FLAC

TRUSE

FALSE

It reduces file size without loss of quality

It increases file size significantly

It only works with video files

It is not compatible with CDs

Mpeg

AVI

GIF

JPEG

A format for images

A format for audio only

A format that allows multiple data streams

A format for text documents

Audio Video Interleave

Audio Visual Interleave

Audio Video Interface

Audio Visual Interface

128

256

512

1024

They use lossy compression

They use lossless compression

They degrade image quality

They enhance image quality

Small Web Format

Standard Web Format

Shockwave Flash

Simple Web Format

True

False