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Important examples of compressed data structures include the compressed suffix array and the FM-index, both of which can represent an arbitrary text of characters T for pattern matching. Given any input pattern P, they support the operation of finding if and where P appears in T.

A standard example of this technique is JPEG compression for images, where compression is achieved by discarding less noticeable visual information. Likewise, MP3 compression for audio files works by removing sounds that the human ear is less likely to perceive.

What are the two types of data compression? There are two methods of compression – lossy and lossless. Lossy reduces file size by permanently removing some of the original data. Lossless reduces file size by removing unnecessary metadata.

Data compression is the process of encoding, restructuring or otherwise modifying data in order to reduce its size. Fundamentally, it involves re-encoding information using fewer bits than the original representation.

DCT is the most widely used lossy compression method, and is used in multimedia formats for images (such as JPEG and HEIF), video (such as MPEG, AVC and HEVC) and audio (such as MP3, AAC and Vorbis).

A standard example of this technique is JPEG compression for images, where compression is achieved by discarding less noticeable visual information. Likewise, MP3 compression for audio files works by removing sounds that the human ear is less likely to perceive.

Compression techniques fall into two classes: lossless and lossy. Both are very common in use: an example of lossless compression is ZIP archive files and an example of lossy compression is JPEG image files.

Data compression is used whenever there is a need to reduce the size of data. Common examples include: Image compression: Certain digit cameras compress the images for efficient storage. Also, to address the reduction in camera speed due to large raw images, compression is done.

Compression methods are algorithms used to compress stored files. Data is compressed to achieve the best storage capacity from the server. Compression also helps in transmitting data in compressed form to consume less data.