Systems and methods for dynamic normalization to reduce loss in precision for low-level signals
First Claim
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1. An apparatus that is configured for dynamic normalization to reduce loss in precision for low-level signals, comprising:
- a processor;
memory in electronic communication with the processor; and
instructions stored in the memory, the instructions being executable to;
determine a normalization factor for a current frame of a signal, wherein the current frame comprises M bits, wherein the M bits comprise N most significant bits and M-N least significant bits, wherein the M-N least significant bits of the current frame are discarded, wherein the normalization factor depends on an amplitude of the current frame of the signal, and wherein the normalization factor also depends on values of filter states of a high band excitation generator after one or more operations were performed on a previous frame of a normalized low band excitation signal;
normalize the current frame of the signal based on the normalization factor that is determined, wherein the normalized current frame utilizes more of the N most significant bits than the current frame; and
adjust the filter states'"'"' normalization factor based on the normalization factor that is determined.
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Abstract
A normalization factor for a current frame of a signal may be determined. The normalization factor may depend on an amplitude of the current frame of the signal. The normalization factor may also depend on values of states after one or more operations were performed on a previous frame of a normalized signal. The current frame of the signal may be normalized based on the normalization factor that is determined. The states'"'"' normalization factor may be adjusted based on the normalization factor that is determined.
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Citations
20 Claims
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1. An apparatus that is configured for dynamic normalization to reduce loss in precision for low-level signals, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory, the instructions being executable to; determine a normalization factor for a current frame of a signal, wherein the current frame comprises M bits, wherein the M bits comprise N most significant bits and M-N least significant bits, wherein the M-N least significant bits of the current frame are discarded, wherein the normalization factor depends on an amplitude of the current frame of the signal, and wherein the normalization factor also depends on values of filter states of a high band excitation generator after one or more operations were performed on a previous frame of a normalized low band excitation signal; normalize the current frame of the signal based on the normalization factor that is determined, wherein the normalized current frame utilizes more of the N most significant bits than the current frame; and adjust the filter states'"'"' normalization factor based on the normalization factor that is determined. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for dynamic normalization to reduce loss in precision for low-level signals, comprising:
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determining a normalization factor for a current frame of a signal, wherein the current frame comprises M bits, wherein the M bits comprise N most significant bits and M-N least significant bits, wherein the M-N least significant bits of the current frame are discarded, wherein the normalization factor depends on an amplitude of the current frame of the signal, and wherein the normalization factor also depends on values of filter states of a high band excitation generator after one or more operations were performed on a previous frame of a normalized low band excitation signal; normalizing the current frame of the signal based on the normalization factor that is determined, wherein the normalized current frame utilizes more of the N most significant bits than the current frame; and adjusting the filter states'"'"' normalization factor based on the normalization factor that is determined, wherein the determining, the normalizing, and the adjusting are performed by a communications device.
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19. An apparatus that is configured for dynamic normalization to reduce loss in precision for low-level signals, comprising:
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means for determining a normalization factor for a current frame of a signal, wherein the current frame comprises M bits, wherein the M bits comprise N most significant bits and M-N least significant bits, wherein the M-N least significant bits of the current frame are discarded, wherein the normalization factor depends on an amplitude of the current frame of the signal, and wherein the normalization factor also depends on values of filter states of a high band excitation generator after one or more operations were performed on a previous frame of a normalized low band excitation signal; means for normalizing the current frame of the signal based on the normalization factor that is determined, wherein the normalized current frame utilizes more of the N most significant bits than the current frame; and means for adjusting the filter states'"'"' normalization factor based on the normalization factor that is determined; wherein the means for determining, the means for normalizing, and the means for adjusting comprise hardware.
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20. A non-transitory computer-readable medium comprising a set of instructions executable by a processor to:
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determine a normalization factor for a current frame of a signal, wherein the current frame comprises M bits, wherein the M bits comprise N most significant bits and M-N least significant bits, wherein the M-N least significant bits of the current frame are discarded, wherein the normalization factor depends on an amplitude of the current frame of the signal, and wherein the normalization factor also depends on values of filter states of a high band excitation generator after one or more operations were performed on a previous frame of a normalized low band excitation signal; normalize the current frame of the signal based on the normalization factor that is determined, wherein the normalized current frame utilizes more of the N most significant bits than the current frame; and adjust the filter states'"'"' normalization factor based on the normalization factor that is determined.
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Specification