IMBE: Difference between revisions
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* Company: [http://www.dvsinc.com Digital Voice Systems Inc.] | * Company: [http://www.dvsinc.com Digital Voice Systems Inc.] | ||
* Patents: (see below) | |||
Improved Multi Band Excitation (IMBE) is a proprietary speech codec used in government and commercial digital radio applications. The codec was developed in the early 90s. | Improved Multi Band Excitation (IMBE) is a proprietary speech codec used in government and commercial digital radio applications. The codec was developed in the early 90s. | ||
==Implementation== | |||
* [http://wiki.radioreference.com/index.php/Digital_Speech_Decoder_(software_package) mbelib] Decoder for IMBE 7200x4400 and 7100x4400 bit/s codecs | |||
==Literature== | |||
References: | |||
* ANSI/TIA/EIA 102.BABA-1998, "Association of Public Safety Communications Officials (APCO) Project 25 Vocoder Description". | |||
* ANSI/TIA/EIA 102.BABA-1, "Association of Public Safety Communications Officials (APCO) Project 25 Half-Rate Vocoder Annex" (July 2009) | |||
Patents | |||
*[http://www.google.com/patents?vid=USPAT6199037 US#6199037] Joint quantization of speech subframe voicing metrics and fundamental frequencies | |||
*[http://www.google.com/patents?vid=USPAT5870405 US#5870405] Digital transmission of acoustic signals over a noisy communication channel | |||
*[http://www.google.com/patents?vid=USPAT5754974 US#5754974] Spectral magnitude representation for multi-band excitation speech coders | |||
*[http://www.google.com/patents?vid=USPAT5664051 US#5664051] Method and apparatus for phase synthesis for speech processing | |||
*[http://www.google.com/patents?vid=USPAT5630011 US#5630011] Quantization of harmonic amplitudes representing speech | |||
*[http://www.google.com/patents?vid=USPAT5517511 US#5517511] Digital transmission of acoustic signals over a noisy communication channel | |||
*[http://www.google.com/patents?vid=USPAT5491772 US#5491772] Methods for speech transmission | |||
*[http://www.google.com/patents?vid=USPAT5247579 US#5247579] Methods for speech transmission | |||
*[http://www.google.com/patents?vid=USPAT5226108 US#5226108] Processing a speech signal with estimated pitch | |||
*[http://www.google.com/patents?vid=USPAT5226084 US#5226084] Methods for speech quantization and error correction | |||
*[http://www.google.com/patents?vid=USPAT5216747 US#5216747] Voiced/unvoiced estimation of an acoustic signal | |||
*[http://www.google.com/patents?vid=USPAT5081681 US#5081681] Method and apparatus for phase synthesis for speech processing | |||
[[Category:Vocoders]] | [[Category:Vocoders]] | ||
[[Category:Audio Codecs]] | [[Category:Audio Codecs]] | ||
Latest revision as of 16:30, 3 October 2010
- Company: Digital Voice Systems Inc.
- Patents: (see below)
Improved Multi Band Excitation (IMBE) is a proprietary speech codec used in government and commercial digital radio applications. The codec was developed in the early 90s.
Implementation
- mbelib Decoder for IMBE 7200x4400 and 7100x4400 bit/s codecs
Literature
References:
- ANSI/TIA/EIA 102.BABA-1998, "Association of Public Safety Communications Officials (APCO) Project 25 Vocoder Description".
- ANSI/TIA/EIA 102.BABA-1, "Association of Public Safety Communications Officials (APCO) Project 25 Half-Rate Vocoder Annex" (July 2009)
Patents
- US#6199037 Joint quantization of speech subframe voicing metrics and fundamental frequencies
- US#5870405 Digital transmission of acoustic signals over a noisy communication channel
- US#5754974 Spectral magnitude representation for multi-band excitation speech coders
- US#5664051 Method and apparatus for phase synthesis for speech processing
- US#5630011 Quantization of harmonic amplitudes representing speech
- US#5517511 Digital transmission of acoustic signals over a noisy communication channel
- US#5491772 Methods for speech transmission
- US#5247579 Methods for speech transmission
- US#5226108 Processing a speech signal with estimated pitch
- US#5226084 Methods for speech quantization and error correction
- US#5216747 Voiced/unvoiced estimation of an acoustic signal
- US#5081681 Method and apparatus for phase synthesis for speech processing