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G.723.1

G.723.1
Tipo de estándar recomendación ITU-T

G.723.1 es un codec de audio para voz que comprime audio de voz en cuadros de 30ms. Una anticipación algorítmica de 7.5 ms de duración significa que el retardo algorítmico total es 37.5 .[1]​ Su nombre oficial es codificador de voz de doble velocidad para comunicaciones multimedia que transmiten a 5.3 y 6.3 kbit/s. A veces se asocia con una marca comercial Truespeech en coprocesadores producidos por DSP Grupo.[2]

Esto es un códec completamente diferente codec de G.723.

Hay dos tasas de bits en los que puede operar G.723.1:

  • 6.3 kbit/s (usando marcos de 24-bytes) usando un algoritmo MPC-MLQ (MOS 3.9)
  • 5.3 kbit/s (using 20-byte frames) usando un algoritmo ACELP (MOS 3.62)

Referencias

[editar]
  1. «G.723.1: Dual rate speech coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s». www.itu.int. Archivado desde el original el 13 de junio de 2021. Consultado el 13 de junio de 2021. 
  2. «CT8022 VOIP/VON G.723.1, G729AB TRUESPEECH® CO-PROCESSOR». Archivado desde el original el 4 de abril de 2018. Consultado el 4 de abril de 2018. «The CT8022 has built-in TrueSpeech 8.5 (compatible with Microsoft Sound System 2.0, and a standard part of Microsoft Windows 95), and TrueSpeech G.723.1 (for H.323 and H.324). [...] The CT8022 provides two additional non-ITU TrueSpeech data rates at 4.8 and 4.1 KBPS.» 

 

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G.723.1
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