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US 8,981,977 B2Granted
System and method for low-power digital signal processing
AssigneeMaxLinear, Inc.
InventorsCurtis Ling, Jining Duan
Life of this patent
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Abstract
A system and method for low-power digital signal processing, for example, comprising adjusting a digital representation of an input signal.
Claims39
A low-power digital processing system comprising:
- at least one module that operates to, at least:
- analyze an input signal represented by a first digital representation;
- based at least in part on the analysis of the input signal, determine whether to adjust a digital representation of a level of the input signal to a second digital representation different from the first digital representation prior to performing a next digital signal processing function on the input signal;
- and
- if it is determined to adjust the digital representation of the level of the input signal, then at least:
- adjust the digital representation of a level of the input signal to the second digital representation;
- and
- perform the next digital signal processing function on the second digital representation of the input signal to form an output signal,
- wherein:
- a level of the output signal is represented by a digital representation like the second digital representation of the level of input signal;
- and
- the at least one module operates to adjust the digital representation of the level of the output signal to a digital representation like the first digital representation.
9 more elements
A low-power digital processing system comprising:
- at least one module that operates to, at least:
- analyze an input signal represented by a first digital representation;
- based at least in part on the analysis of the input signal, determine whether to adjust a digital representation of a level of the input signal to a second digital representation different from the first digital representation prior to performing a next digital signal processing function on the input signal;
- and
- if it is determined to adjust the digital representation of the level of the input signal, then at least:
- adjust the digital representation of a level of the input signal to the second digital representation;
- and
- perform the next digital signal processing function on the second digital representation of the input signal to form an output signal,
- wherein the at least one module is operable to analyze the input signal by, at least in part, determining a quality level of the input signal.
6 more elements
A low-power digital processing system comprising:
- at least one module that operates to, at least:
- analyze an input signal represented by a first digital representation;
- based at least in part on the analysis of the input signal, determine whether to adjust a digital representation of a level of the input signal to a second digital representation different from the first digital representation prior to performing a next digital signal processing function on the input signal;
- and
- if it is determined to adjust the digital representation of the level of the input signal, then at least:
- adjust the digital representation of a level of the input signal to the second digital representation;
- and
- perform the next digital signal processing function on the second digital representation of the input signal to form an output signal,
- wherein the at least one module is operable to analyze the input signal by, at least in part, determining whether a DC offset can be added to the input signal without causing clipping.
6 more elements
A low-power digital processing system comprising:
- at least one module that operates to, at least:
- analyze an input signal represented by a first digital representation;
- based at least in part on the analysis of the input signal, determine whether to adjust a digital representation of a level of the input signal to a second digital representation different from the first digital representation prior to performing a next digital signal processing function on the input signal;
- and
- if it is determined to adjust the digital representation of the level of the input signal, then at least:
- adjust the digital representation of a level of the input signal to the second digital representation;
- and
- perform the next digital signal processing function on the second digital representation of the input signal to form an output signal
- wherein the at least one module is operable to analyze the input signal by, at least in part, determining whether a different type of digital representation of the input signal will result in fewer bit transitions when performing the next digital signal processing function.
6 more elements
A low-power digital processing system comprising:
- at least one module that operates to, at least:
- analyze an input signal represented by a first digital representation;
- based at least in part on the analysis of the input signal, determine whether to adjust a digital representation of a level of the input signal to a second digital representation different from the first digital representation prior to performing a next digital signal processing function on the input signal;
- and
- if it is determined to adjust the digital representation of the level of the input signal, then at least:
- adjust the digital representation of a level of the input signal to the second digital representation;
- and
- perform the next digital signal processing function on the second digital representation of the input signal to form an output signal,
- wherein the second digital representation comprises a lower number of bits representing the input signal relative to the first digital representation, and
- wherein the at least one module operates to adjust the digital representation of a level of the input signal to the second digital representation by, at least in part, decreasing a dynamic range of the input signal.
7 more elements
A low-power digital processing system comprising:
- at least one module that operates to, at least:
- analyze an input signal represented by a first digital representation;
- based at least in part on the analysis of the input signal, determine whether to adjust a digital representation of a level of the input signal to a second digital representation different from the first digital representation prior to performing a next digital signal processing function on the input signal;
- and
- if it is determined to adjust the digital representation of the level of the input signal, then at least:
- adjust the digital representation of a level of the input signal to the second digital representation;
- and
- perform the next digital signal processing function on the second digital representation of the input signal to form an output signal,
- wherein the second digital representation comprises a lower number of zero crossings in digitally representing the input signal relative to the first digital representation.
6 more elements
A low-power digital processing system comprising:
- at least one module that operates to, at least:
- analyze an input signal represented by a first digital representation;
- based at least in part on the analysis of the input signal, determine whether to adjust a digital representation of a level of the input signal to a second digital representation different from the first digital representation prior to performing a next digital signal processing function on the input signal;
- and
- if it is determined to adjust the digital representation of the level of the input signal, then at least:
- adjust the digital representation of a level of the input signal to the second digital representation;
- and
- perform the next digital signal processing function on the second digital representation of the input signal to form an output signal,
- wherein the second digital representation comprises a lower number of zero crossings when performing the next digital signal processing function on the input signal relative to the first digital representation.
6 more elements
A low-power digital processing system comprising:
- at least one module that operates to, at least:
- analyze an input signal represented by a first digital representation;
- based at least in part on the analysis of the input signal, determine whether to adjust a digital representation of a level of the input signal to a second digital representation different from the first digital representation prior to performing a next digital signal processing function on the input signal;
- and
- if it is determined to adjust the digital representation of the level of the input signal, then at least:
- adjust the digital representation of a level of the input signal to the second digital representation;
- and
- perform the next digital signal processing function on the second digital representation of the input signal to form an output signal,
- wherein the second digital representation comprises a different type of digital number representation than the first digital representation.
6 more elements
A low-power digital processing system comprising:
- at least one module that operates to, at least:
- analyze an input signal characterized by a first dynamic range;
- based at least in part on the analysis of the input signal, determine whether to adjust the first dynamic range of the input signal to a second dynamic range prior to performing a next digital signal processing function on the input signal;
- and
- if it is determined to adjust the first dynamic range of the input signal, then at least:
- adjust the first dynamic range of the input signal to the second dynamic range;
- and
- perform the next digital signal processing function on the input signal characterized by the second dynamic range to form an output signal
- wherein the at least one module operates to adjust the first dynamic range of the input signal by, at least in part, shifting the first dynamic range, where said shifting the first dynamic range of the input signal comprises adding a digital offset to the input signal.
6 more elements
Dependencies are inferred from the claim text.