Revision as of 14:40, 15 September 2007 edit Jim.henderson (talk \| contribs) Autopatrolled, Event coordinators, Extended confirmed users, IP block exemptions, Pending changes reviewers, Rollbackers 73,294 edits m →See also: PCM & alphabetize ← Previous edit		Revision as of 11:30, 26 September 2007 edit undo Karada (talk \| contribs) Extended confirmed users 24,485 edits Speech coding uses speech-specific parameter estimation using audio signal processing and speech processing techniques combined with generic data compression algorithms to compress the re Next edit →
Line 1: '''Speech coding''' is the application of [[~~audio~~data ~~compression\|~~compression]] of ~~speech (into a~~ [[~~code~~digital audio]]) ~~for~~signals containing [[~~telecommunication\|transmission~~speech]]. ~~with~~Speech coding uses speech-specific ~~[[codecs]]~~parameter ~~that~~estimation ~~use~~using [[audio signal processing]] and [[speech processing]] techniques combined with generic [[data compression]] algorithms to compress the resulting modeled parameters. The two most important applications using speech coding are [[mobile phone]]s and [[~~internet~~Voice ~~phone~~over IP]]s. The techniques used in speech coding are similar to that in [[audio data compression]] and [[audio coding]] where knowledge in [[psychoacoustics]] is used to transmit only data that is relevant to the human auditory system. For example, in [[narrowband]] speech coding, only information in the frequency band 400 Hz to 3500 Hz is transmitted but the reconstructed signal is still adequate for intelligibility.

Speech coding: Difference between revisions