Universal sampling rate converter in electronic devices and methods
AssigneeMotorola, Inc.
InventorDaniela Radakovic
Life of this patent
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Abstract
A method and apparatus for converting the sampling rate of digital signals including a decimating comprising a low pass filter (122) and a downsampler (124), wherein the input signal is decimated a number of times based on a ratio of an input sampling rate to an output sampling rate. The exemplary apparatus also includes an upsampler (130) and another decimator (140) wherein the signal is upsampled after decimating if a ratio of the input sampling rate to an output sampling rate is not a power of an integer number.
Claims13
A method in a digital signal sampling rate converter that reduces a sampling rate of an input signal, the method comprising:
- decimating the input signal a number of times based on a ratio of the input sampling rate to an output sampling rate;
- upsampling and decimating again and after repeatedly decimating if a condition is satisfied.
A method in a digital signal sampling rate converter, the method comprising:
- decimating an input signal an input sampling,
- decimating includes low pass filtering and downsampling;
- upsampling and decimating again after decimating the input signal only if a ratio of the input sampling rate to an output sampling rate is not a power of an integer number,
- the output sampling rate less than the input sampling rate.
A method in a universal digital signal sampling rate converter, the method comprising:
- downsampling an input signal;
- upsampling and decimating again after downsampling the input signal only if a ratio of an input sampling rate to an output sampling rate is not equal to a power of an integer number.
Dependencies are inferred from the claim text.