Exploring types of compression

• Data compression reduces the size of data to save storage space or reduce transmission
• What type of files are suitable for lossless compression?

  Text files
• Match the type of compression with its characteristic:

  Lossless ↔️ Perfect reconstruction

  Lossy ↔️ Permanent data loss
• How does data compression reduce transmission time?

  Speeds up data transfer
• Lossless compression is ideal for text files and software executables
• What is the role of a compression algorithm in data compression?

  Reduces file size
• Using data compression can double the storage capacity of a device.


  True
• Which type of compression is used for media files like audio and video?

  Lossy
• What is the key characteristic of lossy compression compared to lossless compression?

  Original data cannot be reconstructed
• JPEG image compression removes high-frequency image details that are less perceptible to the human eye.

  True
• Lossy compression results in a trade-off between file size and quality.


  True
• By using compression, you can double the storage capacity
• Lossy compression permanently discards some data to reduce file size.


  True
• Lossy compression permanently discards some data to achieve higher compression ratios.

  True
• Lossy compression allows the original data to be perfectly reconstructed after decompression.

  False
• What is data compression defined as?

  Reducing data size
• Lossy compression allows the original data to be perfectly reconstructed.

  False
• What is one real-world application of data compression?

  Storing more data
• One primary purpose of data compression is saving storage space
• Lossy compression permanently discards some data to achieve higher compression ratios.


  True
• Order the steps in the data compression process:

  1️⃣ Original Data

  2️⃣ Compression Algorithm

  3️⃣ Compressed Data

  4️⃣ Decompression Algorithm

  5️⃣ Reconstructed Data
• Lossless compression is suitable for text files and software executables
• What is one example of lossy compression for audio files?

  MP3
• Match the lossy compression type with its example:

  JPEG Image Compression ↔️ Compressing digital photos

  MP3 Audio Compression ↔️ Compressing music files

  H.264 Video Compression ↔️ Compressing video files
• H.264 video compression removes frames and spatial details
• Data compression reduces the size of data to save storage space
• What are the two primary purposes of data compression?

  Save storage space and reduce transmission time
• For what type of files is lossless compression most suitable?

  Text files and executables
• What are the two main types of data compression?

  Lossy and lossless
• Lossy compression reduces file size by permanently removing some data
• Lossy compression reduces file size without losing any information.

  False
• With a 50% reduction in file size, a 100 MB storage device can store 200 documents.


  True
• Match the type of compression with its advantage:

  Lossless ↔️ Perfect reconstruction

  Lossy ↔️ Higher compression ratio
• Lossless compression allows the original data to be perfectly reconstructed
• What is a key difference between lossy and lossless compression?

  Data loss
• Lossy compression allows the original data to be perfectly reconstructed after decompression.

  False
• Lossy compression permanently discards some data
• What type of audio frequencies does MP3 compression remove?

  Frequencies outside human hearing
• What is the primary goal of data compression?

  Reduce file size
• Lossless compression reduces file size without any loss of information.


  True