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Efficient speech storage via compression of silence periods Gan, Cheong Kuoon
Abstract
An adaptive optimal silence detector is designed and implemented in four speech coding schemes: N-bit PCM (N = 5 to 12), N-bit A-law PCM (N = 4 to 8), N-bit ADPCM (N = 3 to 8) and ADM (Adaptive Delta Modulation) for bit-rates of 16Kps, 24Kps and 32Kps. The amount of compression is approximately 35% for voice recordings such as radio newscasts, highly active conversations and readings from prepared texts. Subjective evaluation shows that the silence-edited versions (silence played back as absolute silence) have acceptability scores of 1.07 lower than the unedited versions with respect to a specific coding scheme for a score range of 1 to 5. With noise-edited versions (silence replaced by random noise during playback) the score degradation is 0.5.
Item Metadata
Title |
Efficient speech storage via compression of silence periods
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1984
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Description |
An adaptive optimal silence detector is designed and implemented in four speech coding schemes: N-bit PCM (N = 5 to 12), N-bit A-law PCM (N = 4 to 8), N-bit ADPCM (N = 3 to 8) and ADM (Adaptive Delta Modulation) for bit-rates of 16Kps, 24Kps and 32Kps.
The amount of compression is approximately 35% for voice recordings such as radio newscasts, highly active conversations and readings from prepared texts. Subjective evaluation shows that the silence-edited versions (silence played back as absolute silence) have acceptability scores of 1.07 lower than the unedited versions with respect to a specific coding scheme for a score range of 1 to 5. With noise-edited versions (silence replaced by random noise during playback) the score degradation is 0.5.
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Type | |
Language |
eng
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Date Available |
2010-05-27
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0096301
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URI | |
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Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.