update specifications (#640)

README.md

@@ -146,22 +146,22 @@ In RTSP, media streams are routed between server and clients by using RTP packet
 |[RFC2326, RTSP 1.0](https://datatracker.ietf.org/doc/html/rfc2326)|protocol|
 |[RFC7826, RTSP 2.0](https://datatracker.ietf.org/doc/html/rfc7826)|protocol|
 |[RFC8866, SDP: Session Description Protocol](https://datatracker.ietf.org/doc/html/rfc8866)|SDP|
-|[RTP Payload Format For AV1 (v1.0)](https://aomediacodec.github.io/av1-rtp-spec/)|AV1 payload format|
-|[RTP Payload Format for VP9 Video](https://datatracker.ietf.org/doc/html/draft-ietf-payload-vp9-16)|VP9 payload format|
-|[RFC7741, RTP Payload Format for VP8 Video](https://datatracker.ietf.org/doc/html/rfc7741)|VP8 payload format|
-|[RFC7798, RTP Payload Format for High Efficiency Video Coding (HEVC)](https://datatracker.ietf.org/doc/html/rfc7798)|H265 payload format|
-|[RFC6184, RTP Payload Format for H.264 Video](https://datatracker.ietf.org/doc/html/rfc6184)|H264 payload format|
-|[RFC3640, RTP Payload Format for Transport of MPEG-4 Elementary Streams](https://datatracker.ietf.org/doc/html/rfc3640)|MPEG-4 audio, MPEG-4 video payload formats|
-|[RFC2250, RTP Payload Format for MPEG1/MPEG2 Video](https://datatracker.ietf.org/doc/html/rfc2250)|MPEG-1 video, MPEG-2 audio, MPEG-TS payload formats|
-|[RFC2435, RTP Payload Format for JPEG-compressed Video](https://datatracker.ietf.org/doc/html/rfc2435)|M-JPEG payload format|
-|[RFC7587, RTP Payload Format for the Opus Speech and Audio Codec](https://datatracker.ietf.org/doc/html/rfc7587)|Opus payload format|
-|[Multiopus in libwebrtc](https://webrtc-review.googlesource.com/c/src/+/129768)|Opus payload format|
-|[RFC5215, RTP Payload Format for Vorbis Encoded Audio](https://datatracker.ietf.org/doc/html/rfc5215)|Vorbis payload format|
-|[RFC4184, RTP Payload Format for AC-3 Audio](https://datatracker.ietf.org/doc/html/rfc4184)|AC-3 payload format|
-|[RFC6416, RTP Payload Format for MPEG-4 Audio/Visual Streams](https://datatracker.ietf.org/doc/html/rfc6416)|MPEG-4 audio payload format|
-|[RFC5574, RTP Payload Format for the Speex Codec](https://datatracker.ietf.org/doc/html/rfc5574)|Speex payload format|
-|[RFC3551, RTP Profile for Audio and Video Conferences with Minimal Control](https://datatracker.ietf.org/doc/html/rfc3551)|G726, G722, G711, LPCM payload formats|
-|[RFC3190, RTP Payload Format for 12-bit DAT Audio and 20- and 24-bit Linear Sampled Audio](https://datatracker.ietf.org/doc/html/rfc3190)|LPCM payload format|
+|[RTP Payload Format For AV1 (v1.0)](https://aomediacodec.github.io/av1-rtp-spec/)|payload formats / AV1|
+|[RTP Payload Format for VP9 Video](https://datatracker.ietf.org/doc/html/draft-ietf-payload-vp9-16)|payload formats / VP9|
+|[RFC7741, RTP Payload Format for VP8 Video](https://datatracker.ietf.org/doc/html/rfc7741)|payload formats / VP8|
+|[RFC7798, RTP Payload Format for High Efficiency Video Coding (HEVC)](https://datatracker.ietf.org/doc/html/rfc7798)|payload formats / H265|
+|[RFC6184, RTP Payload Format for H.264 Video](https://datatracker.ietf.org/doc/html/rfc6184)|payload formats / H264|
+|[RFC3640, RTP Payload Format for Transport of MPEG-4 Elementary Streams](https://datatracker.ietf.org/doc/html/rfc3640)|payload formats / MPEG-4 audio, MPEG-4 video|
+|[RFC2250, RTP Payload Format for MPEG1/MPEG2 Video](https://datatracker.ietf.org/doc/html/rfc2250)|payload formats / MPEG-1 video, MPEG-2 audio, MPEG-TS|
+|[RFC2435, RTP Payload Format for JPEG-compressed Video](https://datatracker.ietf.org/doc/html/rfc2435)|payload formats / M-JPEG|
+|[RFC7587, RTP Payload Format for the Opus Speech and Audio Codec](https://datatracker.ietf.org/doc/html/rfc7587)|payload formats / Opus|
+|[Multiopus in libwebrtc](https://webrtc-review.googlesource.com/c/src/+/129768)|payload formats / Opus|
+|[RFC5215, RTP Payload Format for Vorbis Encoded Audio](https://datatracker.ietf.org/doc/html/rfc5215)|payload formats / Vorbis|
+|[RFC4184, RTP Payload Format for AC-3 Audio](https://datatracker.ietf.org/doc/html/rfc4184)|payload formats / AC-3|
+|[RFC6416, RTP Payload Format for MPEG-4 Audio/Visual Streams](https://datatracker.ietf.org/doc/html/rfc6416)|payload formats / MPEG-4 audio|
+|[RFC5574, RTP Payload Format for the Speex Codec](https://datatracker.ietf.org/doc/html/rfc5574)|payload formats / Speex|
+|[RFC3551, RTP Profile for Audio and Video Conferences with Minimal Control](https://datatracker.ietf.org/doc/html/rfc3551)|payload formats / G726, G722, G711, LPCM|
+|[RFC3190, RTP Payload Format for 12-bit DAT Audio and 20- and 24-bit Linear Sampled Audio](https://datatracker.ietf.org/doc/html/rfc3190)|payload formats / LPCM|
 |[Codec specifications](https://github.com/bluenviron/mediacommon#specifications)|codecs|
 |[Golang project layout](https://github.com/golang-standards/project-layout)|project layout|