What is H.264?
H.264 is an industry standard for video compression, the process of converting digital video into a format that takes up less capacity when it is stored or transmitted. Video compression (or video coding) is an essential technology for applications such as digital television, DVD-Video, mobile TV, videoconferencing and internet video streaming. Standardizing video compression makes it possible for products from different manufacturers (e.g. encoders, decoders and storage media) to inter-operate. An encoder converts video into a compressed format and a decoder converts compressed video back into an uncompressed format.
H.264 Specification:
codec, that was jointly developed by the International Telecommunications Union (as H.264) and International Organization for Standardization/International Electrotechnical Commission Moving Picture Experts Group (as MPEG-4 Part 10, Advanced Video Coding, or AVC). Thus, the terms H.264 and AVC mean the same thing and are interchangeable.
As a video codec, H.264 can be incorporated into multiple container formats, and is frequently produced in the MPEG-4 container format, which uses the .MP4 extension, as well as QuickTime (.MOV), Flash (.F4V), 3GP for mobile phones (.3GP),, and the MPEG transport stream (.ts). Most of the time, but not all the time, H.264 video is encoded with audio compressed with the AAC (Advanced Audio Coding) codec, which is an ISO/IEC standard (MPEG4 Part 3)
Application of H.264:
As well as its improved compression performance, H.264 offers greater flexibility in terms of compression options and transmission support. An H.264 encoder can select from a wide variety of compression tools, making it suitable for applications ranging from low-bitrate, low-delay mobile transmission through high definition consumer TV to professional television production. The standard provides integrated support for transmission or storage, including a packetised compressed format and features that help to minimize the affect of transmission errors.
4/AVC is being adopted for an increasing range of applications, including:
High Definition DVDs (HD-DVD and Blu-Ray formats)
High Definition TV broadcasting in Europe
Apple products including iTunes video downloads, iPod video and MacOS
NATO and US DoD video applications
Mobile TV broadcasting
Internet video
Videoconferencing
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9 июл 2024
