Dandome un receso de tanto trabajo estaba revisando la pagina de Elio Rojano quea empresa Broadcom ha lanzado un códec que muestrea a 16 Khz:
Broadcom (la empresa que hay detrás de los dispositivos de red) acaba de anunciar la disposición pública y libre de un códec que muestrea a 16Khz:
BroadVoice16 (BV16) for narrowband telephone-bandwidth speech sampled at 8 kHz,
and a 32 kb/s version called BroadVoice32 (BV32) for wideband speech sampled at 16 kHz.
Las ventajas:
- Low Delay (Latency): algorithmic buffering delay of merely 5 ms (compared with 15 to 40 ms of most competing codecs)
- Low Complexity: much lower MIPS requirements than most competing codecs (typically 1/3 to 1/2 of comparable ITU-T G.72x codecs), also lower memory requirement than most competing codecs
- High Quality: equivalent or better speech quality than most competing codecs in PESQ comparisons and in extensive formal subjective MOS listening tests conducted by AT&T Labs, COMSAT Labs, and Dynastat, Inc
- Moderate Bit-Rate: at 2 bits/sample, coding efficiency is higher than G.711, G.726, and G.722 and comparable to many other codecs
- Availability: Broadcom is providing both the floating-point and fixed-point C source code of BroadVoice16 and BroadVoice 32 under an open source license and on a royalty-free basis
Aquí les dejo el link de la noticia
NOTA:
Aquí les dejo una lista de los codecs que hay para Asterisk y el ancho de banda que utiliza, para más información visiten la página BYTECODERS:
- G.711 ulaw (utilizado en EEUU) (64 Kbps)
- G.711 alaw (utilizado en Europa) (64 Kbps)
- G.723.1 - pass-thru sin licencia (6.3/5.3Kbps) usado en H.323
- G.726 – (16/24/32/40kbps)
- G.729 - pass-thru sin licencia (8Kbps)
- GSM (13Kbps)
- iLBC (13.33/15.2Kbps)
- LPC10 (no recomendado!)
- Speex – configurable 4-48kbps
De paso les paso una imagen tomada de voiptoday:
Tags: ancho de banda, broadcom, calidad de voz, codec, GPL