Some forms of lossy compression can be thought of as an application of transform coding, which is a type of data compression used for digital images, digital audio signals, and digital video. The transformation is typically used to enable better (more targeted) quantization. Knowledge of the application is used to choose information to discard, thereby lowering its bandwidth. The remaining information can then be compressed via a variety of methods. When the output is decoded, the result may not be identical to the original input, but is expected to be close enough for the purpose of the application.
Some forms of lossy compression can be thought of as an application of transform coding which is a type of data compression used for digital images digital audio signals and digital video The transformation is typically used to enable better (more targeted) quantization Knowledge of the application is used to choose information to discard thereby lowering its bandwidth The remaining information can then be compressed via a variety of methods When the output is decoded the result may not be identical to the original input but is expected to be close enough for the purpose of the application