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- Q177858 subject Q8037029.
- Q177858 subject Q8275524.
- Q177858 subject Q8790867.
- Q177858 abstract "G.728 is an ITU-T standard for speech coding operating at 16 kbit/s. It is officially described as Coding of speech at 16 kbit/s using low-delay code excited linear prediction.Technology used is LD-CELP, low-delay code excited linear prediction. Delay of the codec is only 5 samples (0.625 ms). The linear prediction is calculated backwards with a 50th order linear predictive coding filter. The excitation is generated with gain scaled VQ. The standard was finished in 1992 in the form of algorithm exact floating point code. In 1994 a bit exact fixed point codec was released. G.728 passes low bit rate modem signals up to 2400 bit/s. Also network signaling goes through. The complexity of the codec is 30 MIPS. 2 kilobytes of RAM is needed for codebooks. Mean opinion score for G.728 is 3.61.The essence of CELP techniques, which is an analysis-by-synthesis approach to codebook search, is retained in LD-CELP. The LD-CELP however, uses backward adaptation of predictors and gain to achieve an algorithmic delay of 0.625 ms.RealAudio 28.8 is a reduced-bitrate variant of this standard, using 15.2 kbit/s.".
- Q177858 wikiPageExternalLink recommendation.asp?type=folders&lang=e&parent=T-REC-G.728.
- Q177858 wikiPageWikiLink Q1301371.
- Q177858 wikiPageWikiLink Q1334738.
- Q177858 wikiPageWikiLink Q1826438.
- Q177858 wikiPageWikiLink Q184748.
- Q177858 wikiPageWikiLink Q1915482.
- Q177858 wikiPageWikiLink Q201093.
- Q177858 wikiPageWikiLink Q3194304.
- Q177858 wikiPageWikiLink Q4007363.
- Q177858 wikiPageWikiLink Q4438347.
- Q177858 wikiPageWikiLink Q52946.
- Q177858 wikiPageWikiLink Q5295.
- Q177858 wikiPageWikiLink Q5607.
- Q177858 wikiPageWikiLink Q604974.
- Q177858 wikiPageWikiLink Q612536.
- Q177858 wikiPageWikiLink Q649900.
- Q177858 wikiPageWikiLink Q71486.
- Q177858 wikiPageWikiLink Q79726.
- Q177858 wikiPageWikiLink Q8037029.
- Q177858 wikiPageWikiLink Q8275524.
- Q177858 wikiPageWikiLink Q856184.
- Q177858 wikiPageWikiLink Q8790867.
- Q177858 wikiPageWikiLink Q8805.
- Q177858 comment "G.728 is an ITU-T standard for speech coding operating at 16 kbit/s. It is officially described as Coding of speech at 16 kbit/s using low-delay code excited linear prediction.Technology used is LD-CELP, low-delay code excited linear prediction. Delay of the codec is only 5 samples (0.625 ms). The linear prediction is calculated backwards with a 50th order linear predictive coding filter. The excitation is generated with gain scaled VQ.".
- Q177858 label "G.728".