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- G.729.1 abstract "G.729.1 is an 8-32 kbit/s embedded speech and audio codec providing bitstream interoperability with G.729, G.729 Annex A and G.729 Annex B. Its official name is G.729-based embedded variable bit rate codec: An 8-32 kbit/s scalable wideband coder bitstream interoperable with G.729.This codec has been designed to provide better quality and more flexibility than the existing ITU-T G.729 speech coding standard.G.729.1 is scalable in bit rate, acoustic bandwidth and complexity.In addition it offers various encoder and decoder modes, including the support of both 8 and 16 kHz input/output sampling frequency, compatibility with G.729B, and reduced algorithmic delay.The bitstream of G.729.1 is structured into 12 hierarchical layers.The first layer (or core layer) at 8 kbit/s follows the G.729 format.The second layer (adds 4 kbit/s for a total of 12 kbit/s) is a narrowband enhancement layer. The third layer (2 kbit/s for a total of 14 kbit/s) is a bandwidth extension layer. Further layers (in 2 kbit/s steps) are wideband enhancement layers.The G.729.1 output bandwidth is 50–4000 Hz at 8 and12 kbit/s, and 50–7000 Hz from 14 to 32 kbit/s. G.729.1 is also known as G.729 Annex J and G.729EV where EV stands for Embedded Variable (bit rate).The G.729.1 algorithm is based on a three-stage coding structure: embedded Code-excited linear prediction (CELP) coding of the lower band (50–4000 Hz), parametric coding of the higher band (4000–7000 Hz) by Time-Domain Bandwidth Extension (TDBWE), and enhancement of the full band (50–7000 Hz) by a predictive transform coding technique referred to as Time-Domain Aliasing Cancellation (TDAC).".
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- G.729.1 wikiPageWikiLink Acoustic_music.
- G.729.1 wikiPageWikiLink Algorithm.
- G.729.1 wikiPageWikiLink Bandwidth_(signal_processing).
- G.729.1 wikiPageWikiLink Bit_rate.
- G.729.1 wikiPageWikiLink Bitstream.
- G.729.1 wikiPageWikiLink Category:Audio_codecs.
- G.729.1 wikiPageWikiLink Category:ITU-T_recommendations.
- G.729.1 wikiPageWikiLink Category:Speech_codecs.
- G.729.1 wikiPageWikiLink Code-excited_linear_prediction.
- G.729.1 wikiPageWikiLink Codec.
- G.729.1 wikiPageWikiLink Embedded_system.
- G.729.1 wikiPageWikiLink G.729.
- G.729.1 wikiPageWikiLink Hertz.
- G.729.1 wikiPageWikiLink ITU-T.
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- G.729.1 wikiPageWikiLink List_of_codecs.
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- G.729.1 subject Category:Audio_codecs.
- G.729.1 subject Category:ITU-T_recommendations.
- G.729.1 subject Category:Speech_codecs.
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- G.729.1 comment "G.729.1 is an 8-32 kbit/s embedded speech and audio codec providing bitstream interoperability with G.729, G.729 Annex A and G.729 Annex B.".
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