What Is the Moving Pictures Experts Group?

The Moving Pictures Experts Group (MPEG) is a working group within ISO/IEC Joint Technical Committee 1 (JTC 1) responsible for developing international standards for the compression, decompression, processing, and coded representation of moving pictures, audio, 3D graphics, and genomic data. Founded in 1988 by Leonardo Chiariglione and Hiroshi Yasuda, the group held its inaugural meeting in Ottawa that May and has since produced a portfolio of standards that underpin digital video distribution, internet streaming, mobile media, and broadcast television worldwide. MPEG operates as a technical working group, convening at regular intervals to advance standardization work submitted by industry, national standards bodies, and research institutions.

The group draws expertise from semiconductor companies, consumer electronics manufacturers, telecommunications providers, broadcasters, and universities. Its standards are published jointly by ISO and IEC, and many are also adopted by ITU-T as recommendations, giving them broad international applicability. Over three decades of activity, MPEG standards have enabled markets worth hundreds of billions of dollars and earned five Technical Emmy Awards, including recognitions for AVC/H.264 (2008), HEVC/H.265 (2017), MPEG File Format (2021), and MPEG-DASH (2022). The MPEG official website describes the group's current scope, working structure, and ongoing standards activities.

MPEG Compression Standards

MPEG's first major output, MPEG-1 (ISO/IEC 11172), was finalized in 1992 and designed to compress VHS-quality video for storage on CD-ROM. It introduced the MP3 audio codec (formally MPEG-1 Audio Layer III) as part of its audio specification, which became one of the most widely distributed audio formats in history. MPEG-2 (ISO/IEC 13818) followed in 1994 and extended the standard to broadcast-quality video at higher bit rates, forming the basis for DVD-Video and digital television broadcasting systems including DVB and ATSC. MPEG-2 achieved compression ratios up to 50:1 for standard-definition content while preserving quality adequate for broadcast applications.

MPEG-4 (ISO/IEC 14496) introduced object-based coding, scalable video, and the AAC audio format, and its Part 10 specification, Advanced Video Coding (AVC, also known as H.264), became the dominant video codec for internet video, Blu-ray, mobile streaming, and videoconferencing. A Scholarpedia article on the Moving Picture Experts Group documents the technical evolution from MPEG-1 through MPEG-4 and the committee processes by which these standards were developed.

HEVC and Recent Standards

High Efficiency Video Coding (HEVC, H.265, ISO/IEC 23008-2), finalized in 2013, approximately doubled the compression efficiency of AVC at equivalent perceptual quality, enabling 4K and 8K video delivery over the same bandwidth previously required for HD. HEVC is the baseline codec for Ultra HD Blu-ray, 4K broadcast, and high-resolution surveillance. Its development was conducted jointly with ITU-T's Video Coding Experts Group (VCEG), continuing a collaboration that had also produced AVC.

MPEG-DASH (Dynamic Adaptive Streaming over HTTP, ISO/IEC 23009) standardized the adaptive bitrate streaming protocol used by major internet video platforms to select the appropriate quality level for a viewer's available bandwidth. Versatile Video Coding (VVC, H.266), published in 2020, provides a further approximate doubling of compression over HEVC and is positioned for 8K, 360-degree video, and screen content applications. The ScienceDirect overview of MPEG standards provides engineering detail on the coding tools common across these generations of standards.

Applications

MPEG standards have applications across a wide range of fields, including:

• Digital broadcast television and cable distribution (MPEG-2, HEVC)
• Internet video streaming and video-on-demand platforms (AVC, HEVC, DASH)
• Optical disc formats including DVD and Ultra HD Blu-ray
• Mobile video communication and video conferencing
• Digital cinema, surveillance, and medical imaging archiving