{"id":945,"date":"2017-02-21T18:23:12","date_gmt":"2017-02-21T23:23:12","guid":{"rendered":"http:\/\/r-rtele.com\/ru\/?page_id=945"},"modified":"2017-02-21T18:23:19","modified_gmt":"2017-02-21T23:23:19","slug":"codecs","status":"publish","type":"page","link":"https:\/\/r-rtele.com\/ru\/codecs\/","title":{"rendered":"\u041a\u043e\u0434\u0435\u043a\u0438 (!)"},"content":{"rendered":"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Codec Selections<\/strong><\/td>\nCoding Rates
\n(Kbps)<\/strong><\/td>\n		Packetization Periods
\n(ms)<\/strong><\/td>\n<\/tr>\n
AMR-Bandwidth Efficient<\/td>\nVariable — mix of 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.20, 12.20<\/td>\n20, 40, 60, 80<\/td>\n<\/tr>\n
AMR-Octet Aligned<\/td>\nVariable — mix of 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.20, 12.20<\/td>\n20, 40, 60, 80<\/td>\n<\/tr>\n
EFR<\/td>\n12.2<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
EVRC<\/td>\nVariable (171, 80, or 16 bit samples per 20 ms)<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
EVRC0<\/td>\nVariable (171, 80, or 16 bit samples per 20 ms)<\/td>\n20<\/td>\n<\/tr>\n
EVRCB0<\/td>\n4.8, 5.8, 6.2, 6.6, 7.0, 7.5, 8.5, 9.3<\/td>\n20<\/td>\n<\/tr>\n
EVRCB<\/td>\nVariable (171, 80, 40, or 16 bit samples per 20 ms)<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
G.711<\/td>\n64<\/td>\n10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60<\/td>\n<\/tr>\n
G.711 with Silence Suppression<\/td>\n64<\/td>\n10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60<\/td>\n<\/tr>\n
G.722<\/td>\n48, 56, 64<\/td>\n10, 20, 30, 40<\/td>\n<\/tr>\n
G.722.1<\/td>\n16, 24, 32<\/td>\n20, 40, 60, 80<\/td>\n<\/tr>\n
G.722.2 (AMRWB-Bandwidth Efficient)<\/td>\n6.6, 8.85, 12.65, 14.25, 15.85, 18.25, 19.85, 23.05, or 23.85<\/td>\n20, 40, 60, 80, 100<\/td>\n<\/tr>\n
G.722.2 (AMRWB-Octet Aligned)<\/td>\n6.6, 8.85, 12.65, 14.25, 15.85, 18.25, 19.85, 23.05, or 23.85<\/td>\n20, 40, 60, 80, 100<\/td>\n<\/tr>\n
G.723.1<\/td>\n5.3, 6.3<\/td>\n30, 60, 90, 120, 150<\/td>\n<\/tr style=\"border: 1px solid grey;\">\n
G.723.1A<\/td>\n5.3, 6.3<\/td>\n30, 60, 90, 120, 150<\/td>\n<\/tr>\n
G.726<\/td>\n32<\/td>\n10, 20, 30, 40<\/td>\n<\/tr>\n
G.726 with Silence Suppression<\/td>\n32<\/td>\n10, 20, 30, 40<\/td>\n<\/tr>\n
G.729A (compatible with G.729)<\/td>\n8<\/td>\n10, 20, 30, 40, 50, 60<\/td>\n<\/tr>\n
G.729A+B<\/td>\n8<\/td>\n10, 20, 30, 40, 50, 60<\/td>\n<\/tr>\n
iLBC, iLBC-SS<\/td>\n15.2<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
13.3<\/td>\n30, 60<\/td>\n<\/tr>\n
Opus<\/td>\n\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 6 to 20 (transcoded)<\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 6 to 510 (pass-through)<\/td>\n

10, 20, 30, 40, 50, 60<\/td>\n<\/tr>\n
T.38 (version 0)<\/td>\nup to 14.4<\/td>\n<\/td>\n<\/tr>\n
T.38 (version 3)<\/td>\nup to 33.6<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

 <\/p>\n

Audio Codecs Supported (Pass-Through Only)<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Codec Selections<\/strong><\/td>\nCoding Rates
\n(Kbps)<\/strong><\/td>\n		Packetization Periods
\n(ms)<\/strong><\/td>\n<\/tr>\n<\/thead>\n
AMR-CRC<\/td>\nVariable — mix of 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.20, 12.20<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
AMR-CRC Robust Sorting<\/td>\nVariable — mix of 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.20, 12.20<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
AMR-CRC-Interleaving-Robust Sorting<\/td>\nVariable — mix of 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.20, 12.20<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
AMR-Interleaving<\/td>\nVariable — mix of 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.20, 12.20<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
AMR-Interleaving-Robust Sorting<\/td>\nVariable — mix of 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.20, 12.20<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
AMR-Robust Sorting<\/td>\nVariable — mix of 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.20, 12.20<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
Broadvoice<\/td>\n16, 32<\/td>\n5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60<\/td>\n<\/tr>\n
Broadvoice with FEC<\/td>\n32<\/td>\n15, 20, 25, 30, 35, 40, 45, 50, 55, 60<\/td>\n<\/tr>\n
Dolby DVC-2\/8000<\/td>\n82<\/td>\n20<\/td>\n<\/tr>\n
EVRC1<\/td>\nVariable (171, 80, or 16 bit samples per 20 ms)<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
EVRC1 FR<\/td>\n8.55<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
EVRCB1<\/td>\nVariable (171, 80, 40, or 16 bit samples per 20 ms)<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
EVRCB1 FR<\/td>\n8.55<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
G722 with Silence Suppression<\/td>\n48, 56, 64<\/td>\n10, 20, 30, 40<\/td>\n<\/tr>\n
G.722.2 (AMRWB-CRC)<\/td>\n6.6, 8.85, 12.65, 14.25, 15.85, 18.25, 19.85, 23.05, or 23.85<\/td>\n20, 40, 60, 80, 100<\/td>\n<\/tr>\n
G.722.2 (AMRWB-CRC-Interleaving)<\/td>\n6.6, 8.85, 12.65, 14.25, 15.85, 18.25, 19.85, 23.05, or 23.85<\/td>\n20, 40, 60, 80, 100<\/td>\n<\/tr>\n
G.722.2 (AMRWB-CRC-Robust Sorting)<\/td>\n6.6, 8.85, 12.65, 14.25, 15.85, 18.25, 19.85, 23.05, or 23.85<\/td>\n20, 40, 60, 80, 100<\/td>\n<\/tr>\n
G.722.2 (AMRWB- CRC-Interleaving-Robust_Sorting)<\/td>\n6.6, 8.85, 12.65, 14.25, 15.85, 18.25, 19.85, 23.05, or 23.85<\/td>\n20, 40, 60, 80, 100<\/td>\n<\/tr>\n
G.722.2 (AMRWB-Interleaving)<\/td>\n6.6, 8.85, 12.65, 14.25, 15.85, 18.25, 19.85, 23.05, or 23.85<\/td>\n20, 40, 60, 80, 100<\/td>\n<\/tr>\n
G.722.2 (AMRWB-Interleaving-Robust Sorting)<\/td>\n6.6, 8.85, 12.65, 14.25, 15.85, 18.25, 19.85, 23.05, or 23.85<\/td>\n20, 40, 60, 80, 100<\/td>\n<\/tr>\n
G.722.2 (AMRWB-Robust Sorting)<\/td>\n6.6, 8.85, 12.65, 14.25, 15.85, 18.25, 19.85, 23.05, or 23.85<\/td>\n20, 40, 60, 80, 100<\/td>\n<\/tr>\n
G.728<\/td>\n16<\/td>\n\n

10, 20, 30, 40, 50, 60, 70, 80,<\/p>\n

90, 100, 110, 120, 130, 140, 150<\/td>\n<\/tr>\n

G.728 with Silence Suppression<\/td>\n16<\/td>\n\n

10, 20, 30, 40, 50, 60, 70, 80,<\/p>\n

90, 100, 110, 120, 130, 140, 150<\/td>\n<\/tr>\n

GSM (full rate)<\/td>\n13.2<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
iSAC HD codec (pass-through and direct media)<\/td>\n10 to 32<\/td>\n30, 60<\/td>\n<\/tr>\n
L16<\/td>\n128<\/td>\n5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60<\/td>\n<\/tr>\n
MS-RTA<\/td>\n8, 16<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
SILK<\/td>\n8, 12, 16, 24<\/td>\n20, 40, 60, 80, 100<\/td>\n<\/tr>\n
Speex<\/td>\n8, 16, 32<\/td>\n20, 40, 60<\/td>\n<\/tr>\n
Speex with FEC<\/td>\n8, 16<\/td>\n20, 40, 60<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Opus Codec Support<\/h2>\n

The\u00a0SBC supports the Opus audio codec in accordance with RFC 6716 and draft-ietf-payload-rtp-opus-01<\/p>\n

Opus is an open, royalty-free, highly versatile\u00a0audio codec consisting of a combination of SILK (LPC) and CELT (Constrained-Energy Lapped Transform) codecs. At any given point of time the LP layer, the MDCT (CELT) layer or both may be active. Opus is used for the following applications:<\/p>\n

    \n
  • VoIP and video conferencing<\/li>\n
  • Music\/video streaming and storage<\/li>\n
  • Remote music jamming<\/li>\n
  • Wireless speakers\/headphones\/microphone<\/li>\n
  • Audio books<\/li>\n
  • Virtualization\/sound servers<\/li>\n<\/ul>\n

    Supported Opus Features<\/strong><\/h3>\n

    The\u00a0 SBC platforms include the following Opus functionality:<\/p>\n

      \n
    • Input sampling rates of 8k Hz (NB) and 16k Hz (WB) are supported on the IDP interface (encoder input\u00a0and decoder output)<\/li>\n
    • Opus-to-Opus pass-through calls\n
        \n
      • Encoding output bandwidths of 8, 12, 16, 24 and 48 kHz<\/li>\n
      • 6 kbps to 510 kbps bit rates<\/li>\n<\/ul>\n<\/li>\n
      • Opus transcoded calls\n
          \n
        • Max bandwidth of 16 kHz<\/li>\n
        • Max bit rate of 20 kbps<\/li>\n<\/ul>\n<\/li>\n
        • Mono mode for both pass-through transcoded calls<\/li>\n
        • Stereo mode for Opus-to-Opus pass-through.<\/li>\n
        • Inband FEC mode<\/li>\n
        • Variable bit rate (VBR)<\/li>\n
        • DTX mode<\/li>\n
        • Single channel mode is supported<\/li>\n
        • Fax\/Modem tone (FMTD) detection is not supported in Opus leg<\/li>\n
        • DTMF (Inband DTMF detection is not guaranteed)<\/li>\n<\/ul>\n

          DTX and Inband FEC Support<\/h3>\n

          SBC supports DTX on the transmitter side and Inband FEC on the transmitter and the receiver side for Opus codec. The following parameters are enhanced to support this feature:<\/p>\n\n\n\n\n\n\n\n\n
          Parameter<\/strong><\/td>\nCurrent Behavior<\/strong><\/td>\nEnhanced Behavior<\/strong><\/td>\n<\/tr>\n<\/thead>\n
          Maxaveragebitrate<\/td>\nmin (route PSP, 20kbit\/s)<\/td>\nmin (offer\/answer of peer, route PSP, 20kbit\/s)<\/td>\n<\/tr>\n
          Useinbandfec<\/td>\nRoute-Config<\/td>\nmin (offer\/answer of peer, route PSP)<\/td>\n<\/tr>\n
          usedtx<\/td>\nRoute-Config<\/td>\nmin (offer\/answer of peer, route PSP)<\/td>\n<\/tr>\n
          usecbr<\/td>\nRoute-Config<\/td>\nConstant bit rate if either peer requests cbr=1 OR route is configured for cbr=1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

           <\/p>\n","protected":false},"excerpt":{"rendered":"

          Codec Selections Coding Rates (Kbps) Packetization Periods (ms) AMR-Bandwidth Efficient Variable — mix of 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.20, 12.20 20, 40, 60, 80 AMR-Octet Aligned Variable — mix of 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.20, 12.20 20, 40, 60, 80 EFR 12.2 20, 40, 60 EVRC Variable (171, 80, or 16 […]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"cloud-page-with-sidebar.php","meta":{"_mi_skip_tracking":false},"acf":[],"_links":{"self":[{"href":"https:\/\/r-rtele.com\/ru\/wp-json\/wp\/v2\/pages\/945"}],"collection":[{"href":"https:\/\/r-rtele.com\/ru\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/r-rtele.com\/ru\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/r-rtele.com\/ru\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/r-rtele.com\/ru\/wp-json\/wp\/v2\/comments?post=945"}],"version-history":[{"count":0,"href":"https:\/\/r-rtele.com\/ru\/wp-json\/wp\/v2\/pages\/945\/revisions"}],"wp:attachment":[{"href":"https:\/\/r-rtele.com\/ru\/wp-json\/wp\/v2\/media?parent=945"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}