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RTP payload formats - Wikipedia
https://en.wikipedia.org/wiki/RTP_payload_formats#:~:text=Audio%20and%20video%20payload%20types%20%20%20,kbit%2Fs%20%28%20...%20%2020%20more%20rows%20
RTP Audio Payload Formats - Columbia University
https://www.cs.columbia.edu/~hgs/rtp/payload_audio.html
The CN payload type is primarily for use with audio codecs that do not support comfort noise as part of the codec itself such as ITU-T Recommendations G.711, G.726, G.727, G.728, and G.722. "Vendors fielding products which use payload type 13 as comfort noise, with the single octet payload, are in conformance with the spec as it currently stands.
Audio Backchannel codec selection
https://doc.milestonesys.com/2020R2/en-US/onvifdriver/audio_backchannel_codec_selection.htm?TocPath=Third-party%20integrations|ONVIF%C2%AE%20drivers|Technical%20section|_____4
Based on this SDP the ONVIF driver will select the needed codec, encode the audio stream, and send the RTP audio packets with the payload type of the codec. For example, if the user has selected “G726, 32kbps, 8kHz”, the ONVIF driver will encode the audio using the G.726 codec in 32 kbps and set the payload type of the RTP packets sent to 99.
[MS-SDPEXT]: Representing new Payload Types | …
https://docs.microsoft.com/en-us/openspecs/office_protocols/ms-sdpext/e37cd12d-a6f7-48ee-b16b-56a59668d4aa
RTP Payload Format for the Opus Speech and Audio Codec
https://datatracker.ietf.org/doc/rfc7587/
Payload Structure The Opus encoder can output encoded frames representing 2.5, 5, 10, 20, 40, or 60 ms of speech or audio data. Further, an arbitrary number of frames can be combined into a packet, up to a maximum packet duration representing 120 ms of speech or audio data.
Real-Time Transport Protocol (RTP) Parameters
https://www.iana.org/assignments/rtp-parameters/rtp-parameters.xhtml
RTP Payload Format for the iSAC Codec - IETF Tools
https://tools.ietf.org/id/draft-ietf-avt-rtp-isac-01.html
The media type ("audio") goes in SDP "m=" as the media name. The media subtype (payload format name) goes in SDP "a=rtpmap" as the encoding name. Any remaining parameters go in the SDP "a=fmtp" attribute by copying them directly from the media type string as a semicolon separated list of parameter=value pairs.
RFC 4749 - RTP Payload Format for the G.729.1 Audio Codec ...
http://www.faqs.org/rfcs/rfc4749.html
Audio Data Audio data of a payload contains one or more consecutive audio frames at the same bit rate. The audio frames are packed in order of time, that is, oldest first. The size of one frame is given by the FT field, as per the table in Section 5.3, and the actual number of frames is easy to infer from the size of the audio data part: nb_frames = (size_of_audio_data) / …
RTP Payload Format and File Storage Format for Opus …
https://tools.ietf.org/id/draft-spittka-payload-rtp-opus-00.html
RTP Payload Format and File Storage Format for Opus Speech and Audio Codec draft-spittka-payload-rtp-opus-00.xml. Abstract. This document defines the Real-time Transport Protocol (RTP) payload format and file storage format for packetization of Opus encoded speech and audio data that is essential to integrate the codec in the most compatible way.
RFC 3389 - Real-time Transport Protocol (RTP) Payload for ...
https://datatracker.ietf.org/doc/html/rfc3389
Abstract This document describes a Real-time Transport Protocol (RTP) payload format for transporting comfort noise (CN). The CN payload type is primarily for use with audio codecs that do not support comfort noise as part of the codec itself such as ITU-T Recommendations G.711, G.726, G.727, G.728, and G.722. 1.
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