Codec Standards

This document updates RFC 5104 by fixing a shortcoming in the specification language of the Codec Control Message Full Intra Request (FIR) description when using it with layered codecs. In particular, a decoder refresh point needs to be sent by a media sender when a FIR is received on...

VC-2 is a video codec that includes parameter values to identify the complexity of the coded VC-2 bit-stream through the use of profiles and levels. These values provide a fast assessment for a decoder to establish whether it has the capability to decode the VC-2 bit-stream. Profiles are...

This document defines the Ogg encapsulation for the Opus interactive speech and audio codec. This allows data encoded in the Opus format to be stored in an Ogg logical bitstream.

This specification provides the requirements and considerations for WebRTC applications to send and receive video across a network. It specifies the video processing that is required as well as video codecs and their parameters.

A comparative introduction to major global wireless standards, technologies and their applications From GSM to LTE-Advanced Pro and 5G: An Introduction to Mobile Networks and Mobile Broadband, 3rd Edition provides technical descriptions of the various wireless technologies currently in use. It...

This service definition is compliant with [1]. It defines a service type referred to herein as the MediaManagement service. The MediaManagement service enables the feature to set-up a media session on a Telephony Client (TC), under the control of a Telephony Control Point (TelCP). This service...

This document specifies the line code 4b/10b for dependable multimedia signal transmission required for complex machines, such as robots and automobiles. This document corresponds to the functions specified in layer 1 to layer 2 of the OSI reference model (ISO/IEC 7498). The purpose of this...

This document describes the RTP payload format for the Mixed Excitation Linear Prediction Enhanced (MELPe) speech coder. MELPe's three different speech encoding rates and sample frame sizes are supported. Comfort noise procedures and packet loss concealment are described in detail.

This document collects important information with the goal of elaborating a system layer for JPEG standards, referred to as JPEG systems. This document summarizes the principles of incremental codestream and file transport that are intended to form the future building blocks JPEG systems....

This RDD describes the 'Low Latency Video Codec' (LLVC) and related technical information; in particular, a description is given of an example decoder implementation with sub-sampling scheme of 4:2:2 and 4:4:4. The following items are four main elements described in this RDD: a) The...

This document defines the Real-time Transport Protocol (RTP) payload format for packetization of Opus-encoded speech and audio data necessary to integrate the codec in the most compatible way. It also provides an applicability statement for the use of Opus over RTP. Further, it describes...

This Recommendation provides models which deliver estimates of the impact of typical IP network impairments on the quality experienced by the end user in multimedia mobile streaming and IPTV applications over transport formats such as: RTP (over UDP), MPEG2-TS (over UDP or RTP/UDP), 3GPP-PSS (over...

This memo describes an RTP payload format for the VP8 video codec. The payload format has wide applicability, as it supports applications from low-bitrate peer-to-peer usage to high-bitrate video conferences.

This Registered Disclosure Document (RDD): - provides specification on TICO compression; - specifies a TICO bitstream syntax containing information for interpreting the compressed image data; - specifies TICO decoding processes for converting compressed image data to reconstructed image data based...

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With the increased popularity of real-time multimedia applications, it is desirable to provide good control of resource usage, and users also demand more control over communication sessions. This document describes how a receiver in a multimedia conversation can pause and resume incoming data from...

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This Recommendation describes a subjective testing methodology for assessing speech intelligibility in communications settings, systems and devices. The ITU-T P.807 test methodology has been tested and was found to be appropriate for assessing speech intelligibility of telecommunications systems (e...

This Recommendation describes an extension of the ITU-T P.834 methodology and is intended to derive wideband equipment impairment factors Ie,wb quantifying the impairment introduced by wideband (50-7000 Hz) speech codecs. It is assumed that the reader is familiar with [ITU-T P.834]. Such...

This Recommendation describes the support of real-time transport protocol (RTP) stream pause and resume functionality as defined by [IETF RFC 7728] on ITU-T H.248 controlled gateways. It describes the mapping of call control session description protocol (SDP) related to pause/resume to ITU-T H.248...