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

Open Ended

How is sound generated?

Multiple Choice

What does a microphone do to sound waves?

• Converts them to light signals

• Converts them to electrical signals

• Stores them as digital files

• Amplifies them without conversion

Multiple Choice

Why is analogue-to-digital conversion necessary in sound recording?

• 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.

Multiple Choice

How does frequency affect the pitch of sound?

• Higher frequency results in lower pitch

• Higher frequency results in higher pitch

• Frequency has no effect on pitch

• Frequency is unrelated to sound

Multiple Choice

What is the definition of wavelength in sound waves?

• Distance between two identical points on waves

• Distance between the peak and trough

• Distance between two different waves

• Distance between the amplitude and node

Multiple Choice

What is the relationship between amplitude and sound loudness?

• Higher amplitude means softer sound

• Higher amplitude means louder sound

• Amplitude has no effect on sound

• Amplitude is unrelated to sound

Multiple Choice

What is the role of a digital-to-analogue converter (DAC) in audio playback?

• 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

Drag and Drop

​

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results in some data loss. Files compressed with ​

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can be converted back to their original state with no loss of data.

Drag these tiles and drop them in the correct blank above

lossy compression

lossless compression

Multiple Choice

Which of the following is TRUE regarding lossless and lossy compressions?

• 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

Multiple Choice

What is the most common format for storing audio on Microsoft Windows computers?

• MP3

• WAV

• AAC

• FLAC

Multiple Choice

What are the key differences between AIFF and WMA both use lossless compression. TRUE or FALSE

• TRUSE

• FALSE

Multiple Choice

What is one advantage of using FLAC for audio files?

• 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

Multiple Choice

Which of the following is NOT a moving image file format?

• Mpeg

• AVI

• GIF

• JPEG

Multiple Choice

What is a container format in file formats?

• A format for images

• A format for audio only

• A format that allows multiple data streams

• A format for text documents

Open Ended

Explain the concept of lossy compression in the context of MPEG.

Multiple Choice

What does AVI stand for in the context of file formats?

• Audio Video Interleave

• Audio Visual Interleave

• Audio Video Interface

• Audio Visual Interface

Multiple Choice

How many colors can a standard GIF image include at maximum?

• 128

• 256

• 512

• 1024

Multiple Choice

What is a key feature of GIFs regarding image quality?

• They use lossy compression

• They use lossless compression

• They degrade image quality

• They enhance image quality

Multiple Choice

What does SWF stand for in the context of file formats?

• Small Web Format

• Standard Web Format

• Shockwave Flash

• Simple Web Format

Multiple Choice

Frames in Flash are used to create motion and animation.

• True

• False