Audio Compression & File Formats in Multimedia
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Questions and Answers

What is the primary purpose of audio compression?

  • To remove redundant or irrelevant information from the audio signal (correct)
  • To increase the storage space required for audio files
  • To improve the quality of the audio signal
  • To slow down the transmission of audio data

    • What is the main difference between lossless and lossy compression?

  • Lossless compression is used for video, while lossy compression is used for audio
  • Lossless compression is faster, while lossy compression is slower
  • Lossless compression preserves all details, while lossy compression reduces some details (correct)
  • Lossless compression is used for real-time playback, while lossy compression is used for storage

    • What is the compression ratio typically achieved by lossless compression routines for audio with a full dynamic range?

  • 1:1 or no compression
  • 4:1 to 12:1
  • 2:1 or lower (correct)
  • 10:1 or higher

    • What is the main advantage of using compressed audio files on the web?

    <p>Reduced storage space and transmission bandwidth</p> Signup and view all the answers

    Which of the following is an example of an uncompressed audio file format?

    <p>WAV</p> Signup and view all the answers

    How many major groups of audio file formats are there?

    <p>3</p> Signup and view all the answers

    What is the primary difference between sampled audio and MIDI data?

    <p>Sampled audio is captured by sampling an analogue waveform, while MIDI data contains instructions on how to perform a musical composition</p> Signup and view all the answers

    Which of the following formats is classified as a lossless compression format?

    <p>FLAC</p> Signup and view all the answers

    What type of sound is MIDI music not well suited for?

    <p>Voice recordings</p> Signup and view all the answers

    What is the advantage of MIDI file formats?

    <p>They are more compact</p> Signup and view all the answers

    What is the main difference between a MIDI file and an MP3 file?

    <p>MIDI files contain instructions on how to perform music, while MP3 files contain the actual audio data</p> Signup and view all the answers

    Which of the following is an example of a sampled audio format?

    <p>WAV</p> Signup and view all the answers

    What is the native sound format for Windows?

    <p>WAV</p> Signup and view all the answers

    What is the compression rate for MP3 format?

    <p>1 : 10 – 14</p> Signup and view all the answers

    What is the main advantage of MP3 format?

    <p>It reduces the number of bytes in a song without hurting the quality</p> Signup and view all the answers

    What is the technique used in MP3 format?

    <p>Perceptual noise shaping</p> Signup and view all the answers

    What is the characteristic of human ear used in MP3 format?

    <p>Inability to hear certain sounds</p> Signup and view all the answers

    What is the definition of streaming media?

    <p>The delivery of audio, video and other multimedia content across the internet</p> Signup and view all the answers

    What is a significant advantage of MIDI music files?

    <p>Small file sizes</p> Signup and view all the answers

    Which of the following audio file formats is known for its excellent sound quality and is supported without a plug-in?

    <p>AIF</p> Signup and view all the answers

    What is a disadvantage of using uncompressed audio file formats like WAV?

    <p>Large file sizes</p> Signup and view all the answers

    Which software can be used to create and edit MIDI music?

    <p>Cubase</p> Signup and view all the answers

    What is a characteristic of Real Audio files?

    <p>High compression</p> Signup and view all the answers

    Which of the following audio file formats is commonly used on music download sites?

    <p>WMA</p> Signup and view all the answers

    What is the process of sending content over the internet in small data packets?

    <p>Streaming</p> Signup and view all the answers

    What is the format developed for streaming audio, comparable in quality to MP3?

    <p>Windows Media Audio</p> Signup and view all the answers

    What is the term for a device or program capable of encoding or decoding a digital data stream or signal?

    <p>Codec</p> Signup and view all the answers

    What is the primary advantage of streaming media over traditional downloading?

    <p>No impact on the end-user's computer</p> Signup and view all the answers

    What is the format developed by Real Networks for streaming media?

    <p>RM</p> Signup and view all the answers

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