Q4Digital Signal Processing

Examples of multirate digital systems include: sample-rate converters used to interface audio equipment operating at different standard rates (e.g., 44.1 kHz CD audio to 48 kHz professional audio); digital audio/video broadcasting systems, which often decimate or interpolate signals for transmission efficiency; subband coding systems such as MP3 audio compression and JPEG2000 image compression, which use multirate filter banks to split a signal into frequency subbands sampled at reduced rates; oversampling sigma-delta analog-to-digital and digital-to-analog converters, which operate at a much higher internal sampling rate than the final output rate, followed by decimation; and software-defined radio systems, which use multirate processing to efficiently handle signals across widely varying bandwidths and center frequencies.