Multisampling with reduced bit samples
First Claim
1. A method for computing the sum of a plurality of sample values, comprising:
- calculating a sum of only a same number of least significant bits of each sample value;
calculating a magnitude from a subset of bits of said plurality of sample values;
shifting and zero-filling said magnitude;
combining said sum and said magnitude to produce a least significant bits portion of a result;
shifting and zero-filling a most significant bits portion of a first one of said plurality of samples to produce a most significant bits portion of the result; and
forming said sum of a plurality of sample values using said least significant bits portion of the result with said most significant bits portion of the result.
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Accused Products
Abstract
A relatively non-complex signal processor supporting an active pixel sensor imaging system is disclosed. The signal processor only requires the first sample from a group of samples in a multiple sample to be transmitted to the signal processor at full resolution. The subsequent samples in that group can be transmitted using only a subset of least significant bits. The minimum number of required LSBs is based upon the level of noise in the system. In one embodiment, the number of LSBs transmitted is k+2 per sample, where k indicates the number bits corresponding to peak noise. In an alternative embodiment, each subsequent sample is transmitted using only k+1 bits.
28 Citations
8 Claims
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1. A method for computing the sum of a plurality of sample values, comprising:
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calculating a sum of only a same number of least significant bits of each sample value; calculating a magnitude from a subset of bits of said plurality of sample values; shifting and zero-filling said magnitude; combining said sum and said magnitude to produce a least significant bits portion of a result; shifting and zero-filling a most significant bits portion of a first one of said plurality of samples to produce a most significant bits portion of the result; and forming said sum of a plurality of sample values using said least significant bits portion of the result with said most significant bits portion of the result. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification