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DSP-7 (Multirate) 1 of 58 Dr. Ravi Billa Digital Signal Processing   7  November 16, 2009 7. Multirate DSP (Deleted in 2007 Syllabus). 2007 Syllabus : Decimation, Interpolation, Sampling rate conversion, Filter design and  Implementation of sampling rate conversion. Contents: 7.1 Time and frequency scaling in continuous-time systems 7.2 Transformation of the independent variable 7.3 Down-sampling 7.4 Up-sampling 7.5 Cascading sampling rate converters 7.6 Identities 7.7 FIR implementation of sampling rate conversion 7.8 Polyphase structures 7.9 Polyphase structure for a decimator  Discrete-time systems with different sampling rates at various parts of the system are called multirate systems. They are linear and time-varying systems. Integer sampling rate converters change the sampling frequency by an integer factor and rational sampling rate converters by a rational number. Here is a sampling of sampling rates in commercial applications (Mitra): Sampling Rates Digital Audio Video Broadcasting   32 kHz CD  44.1 kHz DAT  48 kHz Composite Video Signal  NTSC   14.3181818 MHz  PAL  17.734475 MHz Digital Component Video Signal  Luminance   13.5 MHz  Color difference   6.75 MHz www.jntuworld.com www.jntuworld.com

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