Impact of new digital compression on the perceptual quality of speech transmitted via fixed satellite link
Impact of new digital compression on the perceptual quality of speech transmitted via fixed satellite link
- New search for: Pivac, S.
- New search for: Lipovac, V.
- New search for: Behlilovic, N.
- New search for: Pivac, S.
- New search for: Lipovac, V.
- New search for: Behlilovic, N.
In this paper, we present the results of our theoretical, computer simulation and experimental investigations of correlation between the speech quality as per ITU-T proposed PSQM method, and various (standard) coding algorithms, data transmission speeds and satellite link error performance levels. We considered both waveform encoders and vo(ice)coders, and specifically, backward predictive and CELP encoders, in contrast to classic PCM encoders, showing that, for satellite transmission channels, the coding efficiency and transmission speed are not the only and ultimate code selection criteria, but also the quality of the received signal, code delay, susceptibility to interferences and transmission errors. Some elsewhere standard coding techniques (e.g. CELP) have been shown to be inadequate for the transmission via satellite channels.
Document information
Impact of new digital compression on the perceptual quality of speech transmitted via fixed satellite link
2005-01-01
826125 byte
Conference paper
Electronic Resource
English
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