Audio signal processing method and audio signal processing apparatus therefor
AssigneeSamsung Electronics Co., Ltd.
InventorsJung-min Choi, Jae-yong Cho
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Abstract
An audio signal processing apparatus and method are provided. The apparatus includes a stability determiner and a sigma-delta modulator. The stability determiner divides a frequency band of an input audio signal into one or more sub-frequency bands, compares a level of the input audio signal for each of the sub-frequency bands with a threshold for the sub-frequency band, and generates a stability determination signal according to a result of the comparison. The sigma-delta modulator sigma-delta modulates the input audio signal according to the stability determination signal, and outputs a modulation signal.
Claims26
An audio signal processing apparatus comprising:
- a stability determining circuit that compares a level of an input audio signal for each of at least one sub-frequency band with a threshold for the sub-frequency band, and generates a stability determination signal according to a result of the comparisons;
- and
- a sigma-delta modulator that sigma-delta modulates the input audio signal according to the stability determination signal, and outputs a first modulation signal.
An audio signal processing method comprising:
- dividing a frequency band of an input audio signal into at least one sub-frequency band;
- comparing a level of the input audio signal for each of the at least one sub-frequency band with a threshold for the sub-frequency band;
- generating a stability determination signal according to a result of the comparing;
- performing sigma-delta modulation on the input audio signal according to the stability determination signal;
- and
- outputting the sigma-delta modulated signal as a first modulation signal.
An audio signal processing apparatus comprising:
- a stability determining circuit that divides an audio signal into a plurality of sub-frequency bands, compares a level of the audio signal for each sub-frequency band with a threshold for the sub-frequency band, and generates a stability determination signal according to a result of the comparisons;
- and
- a sigma-delta modulator that sigma-delta modulates the audio signal according to the stability determination signal, and outputs a first modulation signal.
An audio signal processing method comprising:
- dividing a frequency band of an input audio signal into a plurality of sub-frequency bands;
- comparing a level of the input audio signal for at least one sub-frequency band with a threshold for the sub-frequency band;
- determining the stability of the input audio signal based on a result of the comparison;
- performing sigma-delta modulation on the whole of the input audio signal using modulation parameters set according to the determined stability of the input audio signal;
- and
- outputting the sigma-delta modulated signal as a first modulation signal.
Dependencies are inferred from the claim text.