AVS_1857_WG - Audio Video Coding Working Group

Siwei Ma

C/DC - Data Compression Standards Committee

This standard defines a set of tools for efficient coding of immersive visual content, the corresponding decoding and reconstructing procedure. The immersive visual content includes but not limited to panorama video, free view video, light field, 3D model and other kinds of synthetic visual contents. The coding efficiency will be measured by counting the data rates under target visual quality of immersive visual content.

This standard defines a set of tools for efficient video coding and the corresponding decoding procedure, including intra prediction, inter prediction, transform, quantization, and entropy coding.

In this standard, a set of tools for efficient video coding is defined, including directional intra prediction, variable block size inter prediction and context adaptive binary arithmetic coding, and the corresponding decoding procedure. The target applications and services include but not limited TV over Internet, user-generated multimedia content, IP-based video conference, IP-based surveillance, and other video/audio enabled services and applications such as digital television broadcasting, digital storage media, and communication.

This standard defines a set of tools to support specific audio coding functions including general audio coding and lossless audio coding. The tool set defined in this standard, in combination provides regular high quality and efficient coding tool sets for compression, decompression, processing, and representing of audio data to save bandwidth for transmission, to save space for storage, to speed up indexing and multimedia search, and to enhance performance when using mixed media for virtual reality and other applications that demand high bandwidth. The target applications and services include but not limited audio transmission, audio recording, internet streaming, and other video/audio enabled services and applications.

Storage file formats and real-time transport protocol (RTP) payload formats for IEEE 1857(tm) video and IEEE 1857.2(tm) audio are defined. The storage of video and audio not only uses the existing capabilities of the ISO base media file format, but also defines extensions to support specific features of the IEEE 1857 video codec and IEEE 1857.2 audio codec. The target applications and services include but are not limited to Internet media streaming, IPTV, video conference, video telephony, and video-on-demand.

Extensions to IEEE Std 1857(TM)-2013 are provided for surveillance video to support tracking across tracing in multiple cameras at surveillance based on the navigation information which mainly includes timing, location and movement information.

A set of tools for efficient video coding, including directional intra prediction, variable block size inter prediction, context adaptive binary arithmetic coding, and the two corresponding decoding procedures, is defined in this standard. The target applications and services include, but are not limited to, UHDTV (ultra high definition TV), IP-based video surveillance, Internet video, IP-based video conference, IPTV, user-generated multimedia content, and other video/audio-enabled services and applications such as digital television broadcasting, digital storage media, and communication.

A set of tools to support specific audio coding functions including ACELP/TVC compression, bandwidth extension, stereo coding, frame erasure concealment, etc. is defined in this standard. The tool set defined in this standard provides high quality and efficient coding tool sets for compression, decompression, processing, and representation of speech, music or mixed audio signals to save transmission bandwidth and storage space.

Tools for description of visual content, including still images and videos, are specified in this standard. Visual content description consists of visual features, text labels, and device information. This standard is divided into two profiles: basic profile and surveillance profile. The basic profile specifies basic visual descriptors that apply to general purpose. The surveillance profile is a superset of the basic profile and includes all the descriptions specified in the basic profile as well as special descriptors for surveillance purpose.

The media presentation description (MPD) format and media segment format for dynamic and adaptive streaming over networks such as Hypertext Transfer Protocol (HTTP) are specified in this standard. Particularly, the specified formats support multi-stream synchronization, content protection, and content authentication. The target applications and services include, but are not limited to, Internet media streaming, Internet Protocol television (IPTV), and video on demand.