Semiconductor device and voice communication device
AssigneeRenesas Electronics Corporation
InventorsMichi Kumagai, Tetsuya Nakagawa
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Abstract
A semiconductor device for realizing higher-precision noise elimination includes: a decoder which decodes an encoded input signal; a determining unit which determines whether or not a voice signal is included in the input signal; a suppressor which performs a suppressing process for suppressing a noise component included in the input signal on the basis of a result of determination by the determining unit; and a first storage for storing, as a determination criterion value used for the determination, a first criterion value which specifies the proportion of a voice signal with respect to voice distortion noise.
Claims25
A semiconductor device comprising:
- a decoder which decodes an encoded input signal to form a decoded input signal;
- a determining unit which determines whether or not a voice signal is included in the decoded input signal;
- a suppressor which performs a suppressing process for suppressing a noise component included in the decoded input signal on the basis of a result of determination by the determining unit;
- and
- a first storage for storing, as a determination criterion value used for the determination, a first criterion value which specifies the proportion of a voice signal with respect to voice distortion noise.
A voice communication device comprising:
- a receiver for receiving an encoded input signal:
- a decoder which decodes the encoded input signal received by the receiver to thereby create a decoded input signal;
- and
- a suppression processor which performs a process for suppressing noise included in the decoded input signal,
- wherein the suppression processor comprises:
- a determining unit for determining whether or not a voice signal is included in the decoded input signal;
- a suppressor for performing a suppressing process for suppressing a noise component included in the decoded input signal on the basis of a result of determination by the determining unit, and
- a first storage for storing, as a determination criterion value used for the determination, a first criterion value which specifies the proportion of a voice signal with respect to voice distortion noise.
A semiconductor device comprising:
- a decoder which decodes an encoded input signal to produce a decoded input signal;
- a suppression processor which performs a suppressing process for suppressing noise included in the decoded input signal;
- and
- a storage for storing a criterion value for suppressing voice distortion noise, in noise included in the decoded input signal, which is used in the suppressing process.
A noise suppression device capable of suppressing background noise and voice distortion noise in an input signal containing a voice signal, comprising:
- a selector configured to output a selected noise reference value which is the smallest of:
- at least one first criterion value which specifies the proportion of a voice signal with respect to voice distortion noise, and
- a second criterion value which specifies the proportion of a voice signal with respect to background noise;
- and
- a noise suppressor comprising:
- a determination processor configured to determine, based at least in part on the selected noise reference value, whether or not an input signal contains a voice signal;
- a voice distortion noise suppression processor configured to suppress voice distortion noise in the input signal, if the input signal contains a voice signal;
- and
- a background noise suppression processor configured to suppress background noise in the input signal whether or not the input signal contains a voice signal.
Dependencies are inferred from the claim text.