| dbo:abstract |
Bandwidth extension of signal is defined as the deliberate process of expanding the frequency range (bandwidth) of a signal in which it contains an appreciable and useful content, and/or the frequency range in which its effects are such. Its significant advancement in recent years has led to the technology being adopted commercially in several areas including psychacoustic bass enhancement of small loudspeakers and the high frequency enhancement of coded speech and audio. Bandwidth extension has been used in both speech and audio compression applications. The algorithms used in G.729.1 and Spectral Band Replication (SBR) are two of many examples of bandwidth extension algorithms currently in use. In these methods, the low band of the spectrum is encoded using an existing codec, whereas the high band is coarsely parameterized using fewer parameters. Many of these bandwidth extension algorithms make use of the correlation between the low band and the high band in order to predict the wider band signal from extracted lower-band features. Others encode the high band using very few bits. This is often sufficient since the ear is less sensitive to distortions in the high band compared to the low band. (en) |
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dbr:Psychoacoustics dbr:Perceptual_audio_coding dbr:Loudspeaker dbr:MP3Pro dbr:Signal_(electrical_engineering) dbr:Single-sideband_modulation dbr:Spectrum dbr:G.729.1 dbr:Advanced_Audio_Coding dbr:Aliasing dbc:Information_theory dbr:Bandwidth_(signal_processing) dbr:Audio_Engineering_Society dbr:Missing_fundamental dbr:Spectral_band_replication dbr:Spectral_Band_Replication dbr:Subharmonic_synthesizer dbr:International_Conference_on_Acoustics,_Speech_and_Signal_Processing dbr:Filterbank dbr:AAC+ |
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dbt:More_footnotes dbt:Reflist |
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dbc:Information_theory |
| rdfs:comment |
Bandwidth extension of signal is defined as the deliberate process of expanding the frequency range (bandwidth) of a signal in which it contains an appreciable and useful content, and/or the frequency range in which its effects are such. Its significant advancement in recent years has led to the technology being adopted commercially in several areas including psychacoustic bass enhancement of small loudspeakers and the high frequency enhancement of coded speech and audio. (en) |
| rdfs:label |
Bandwidth extension (en) |
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freebase:Bandwidth extension wikidata:Bandwidth extension https://global.dbpedia.org/id/4Vjmh |
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wikipedia-en:Bandwidth_extension?oldid=1093119254&ns=0 |
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wikipedia-en:Bandwidth_extension |
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dbr:Ronald_Aarts dbr:Loudspeaker dbr:Bandwidth_(signal_processing) dbr:Bandwidth_Extension dbr:Loudspeaker_measurement dbr:Subharmonic_synthesizer |
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wikipedia-en:Bandwidth_extension |