Lossy compression is a data compression method that sacrifices some information to achieve an even smaller file size than lossless compression. Lossy compression is most often used on video, audio, and many types of image files. For example, in an MP3, lossy compression can remove parts of the sound file that the human ear can barely hear.
In information technology,
lossy compression or irreversible compression is the class of data compression methods that uses inexact approximations and partial data discarding to represent the content. These techniques are used to reduce data size for storing, handling, and transmitting content.Lossy is a
data encoding and compression technique that deliberately discards some data in the compression process. The lossy compression method filters and discards needless and redundant data to reduce the amount of data being compressed and later being executed on a computer.A
compression technique that does not decompress digital data back to 100% of the original. Lossy methods can provide high degrees of compression and result in smaller compressed files, but some number of the original pixels, sound waves or video frames are removed forever.What is lossy compression? By definition, lossy compression
removes background data and approximates certain details of an image file — making it smaller and easier to handle, store or send. However, in return for a more manageable file size, you will lose data — permanently - hence the term ‘lossy’.
HDC with SBR is a proprietary lossy audio compression codec developed by iBiquity for use with HD Radio.
It replaced the earlier PAC codec in 2003.
In June 2017, the format was reverse engineered and determined to be a variant of HE-AACv1.
It uses a modified discrete cosine transform (MDCT) audio coding data compression algorithm.
