September 2008
Intermediate to advanced
550 pages
18h 10m
English
Content preview from VoIP Voice and Fax Signal ProcessingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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INDEX
Absolute category rating (ACR):
voice quality measurements, 429
Acknowledgement (ACK) signal:
call wait ID flow, PSTN, 194–196
Acoustic echo canceller (AEC), 120–123
Acoustic interfaces, voice over internet protocol, 26–27
Active monitoring, voice quality objective measurements, 429–434
Adaptation filtering algorithms, echo cancellation, 132–137
adaptive transversal filter, LMS, 133–135
affine projection algorithm, 137–138
leaky LMS, 136
RLS/affine projections, 136–137
RLS disadvantages, 137
Adapter components, voice over internet protocol, 28–31
IP PBX adapter, 40
voice flow, 31
Adaptive differential pulse code modulation (ADPCM):
cordless phones, 455
Adaptive jitter buffer (AJB):
defined, 477
implementation guidelines, 239–241
non-talk-spurt-based adjustments, 226, 233–234
playout-based timing reference and talk-spurts, 231–232
talk-spurt-based adjustments, 225–226
voice flow and delay variations mapping, 227–228
voice quality estimation:
packet flow impediments, 451
silence zone utilization, 451–452
Adaptive multirate (AMR) codec:
packet-loss compression, 109
transcoding and conference operations, 454–455
voice compression, 68
wideband (AMR-WB) coded, 69–70
Adaptive transversal filter with LMS, echo cancellation, ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.