A dual-band excitation LSP codec for very low bit rate transmission
In multiband excitation (MBE) vocoders, the excitation spectrum is a series of voiced/unvoiced (v/uv) bands. This allows each speech segment to be partially voiced and partially unvoiced. It has been found that excitation in low frequency region is mostly voiced whereas in high frequency area, it is...
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| creator | Chiu, K.M. Ching, P.C. |
| description | In multiband excitation (MBE) vocoders, the excitation spectrum is a series of voiced/unvoiced (v/uv) bands. This allows each speech segment to be partially voiced and partially unvoiced. It has been found that excitation in low frequency region is mostly voiced whereas in high frequency area, it is usually unvoiced. Although dividing the excitation spectrum into several v/uv bands (12 bands are commonly used) provides better output speech quality, its implementation for very low bit rate transmission is very difficult, if not impossible. In the paper, a modified version called a dual-band excitation LSP vocoder is proposed. The excitation spectrum, in this case, contains either one or two v/uv bands. Line spectral pairs (LSP) are used to represent the spectral envelope because of its effectiveness. Speech quality at a transmission rate of 2 kbps has been found to be clear and intelligible.< > |
| doi_str_mv | 10.1109/SIPNN.1994.344866 |
| format | Conference Proceeding |
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Speech quality at a transmission rate of 2 kbps has been found to be clear and intelligible.< ></description><identifier>ISBN: 9780780318656</identifier><identifier>ISBN: 078031865X</identifier><identifier>DOI: 10.1109/SIPNN.1994.344866</identifier><language>eng</language><publisher>IEEE</publisher><subject>Bit rate ; Codecs ; Computational modeling ; Dual band ; Frequency conversion ; Signal processing ; Speech enhancement ; Speech processing ; Vocoders ; White noise</subject><ispartof>Proceedings of ICSIPNN '94. 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Speech quality at a transmission rate of 2 kbps has been found to be clear and intelligible.< ></description><subject>Bit rate</subject><subject>Codecs</subject><subject>Computational modeling</subject><subject>Dual band</subject><subject>Frequency conversion</subject><subject>Signal processing</subject><subject>Speech enhancement</subject><subject>Speech processing</subject><subject>Vocoders</subject><subject>White noise</subject><isbn>9780780318656</isbn><isbn>078031865X</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>1994</creationdate><recordtype>conference_proceeding</recordtype><sourceid>6IE</sourceid><sourceid>RIE</sourceid><recordid>eNotj8tqwzAURAWl0JL6A9qVfsCuVMmS7jKYPgImDST7cCVLoOLYRVIf-fsa0mFg4DAMDCH3nDWcM3jcb3bbbcMBZCOkNEpdkQq0YYsFN6pVN6TK-YMtki3nwG9Jt6bDF461xWmg_tfFgiXOE-33O-rmwTsa5kS_fTrTcf6hNhaasHhaEk75FHNeynfkOuCYffWfK3J4eT50b3X__rrp1n0dDZQaUFkIUhuN3tggpGaAPLhWDm7QsADFrAUGQjHUOnDbSmegVU9Sgg5KrMjDZTZ674-fKZ4wnY-Xo-IPtKBINQ</recordid><startdate>1994</startdate><enddate>1994</enddate><creator>Chiu, K.M.</creator><creator>Ching, P.C.</creator><general>IEEE</general><scope>6IE</scope><scope>6IL</scope><scope>CBEJK</scope><scope>RIE</scope><scope>RIL</scope></search><sort><creationdate>1994</creationdate><title>A dual-band excitation LSP codec for very low bit rate transmission</title><author>Chiu, K.M. ; Ching, P.C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i89t-9a6b9f4787ae8bf34709a1fc54dcd79f3460bb909360a77f1b54c895624497f63</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>1994</creationdate><topic>Bit rate</topic><topic>Codecs</topic><topic>Computational modeling</topic><topic>Dual band</topic><topic>Frequency conversion</topic><topic>Signal processing</topic><topic>Speech enhancement</topic><topic>Speech processing</topic><topic>Vocoders</topic><topic>White noise</topic><toplevel>online_resources</toplevel><creatorcontrib>Chiu, K.M.</creatorcontrib><creatorcontrib>Ching, P.C.</creatorcontrib><collection>IEEE Electronic Library (IEL) Conference Proceedings</collection><collection>IEEE Proceedings Order Plan All Online (POP All Online) 1998-present by volume</collection><collection>IEEE Xplore All Conference Proceedings</collection><collection>IEEE Electronic Library (IEL)</collection><collection>IEEE Proceedings Order Plans (POP All) 1998-Present</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Chiu, K.M.</au><au>Ching, P.C.</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>A dual-band excitation LSP codec for very low bit rate transmission</atitle><btitle>Proceedings of ICSIPNN '94. International Conference on Speech, Image Processing and Neural Networks</btitle><stitle>SIPNN</stitle><date>1994</date><risdate>1994</risdate><spage>479</spage><epage>482 vol.2</epage><pages>479-482 vol.2</pages><isbn>9780780318656</isbn><isbn>078031865X</isbn><abstract>In multiband excitation (MBE) vocoders, the excitation spectrum is a series of voiced/unvoiced (v/uv) bands. This allows each speech segment to be partially voiced and partially unvoiced. It has been found that excitation in low frequency region is mostly voiced whereas in high frequency area, it is usually unvoiced. Although dividing the excitation spectrum into several v/uv bands (12 bands are commonly used) provides better output speech quality, its implementation for very low bit rate transmission is very difficult, if not impossible. In the paper, a modified version called a dual-band excitation LSP vocoder is proposed. The excitation spectrum, in this case, contains either one or two v/uv bands. Line spectral pairs (LSP) are used to represent the spectral envelope because of its effectiveness. Speech quality at a transmission rate of 2 kbps has been found to be clear and intelligible.< ></abstract><pub>IEEE</pub><doi>10.1109/SIPNN.1994.344866</doi></addata></record> |
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| identifier | ISBN: 9780780318656 |
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| language | eng |
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| source | IEEE Electronic Library (IEL) Conference Proceedings |
| subjects | Bit rate Codecs Computational modeling Dual band Frequency conversion Signal processing Speech enhancement Speech processing Vocoders White noise |
| title | A dual-band excitation LSP codec for very low bit rate transmission |
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