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介绍ＩＴＵ－ＴＳＧ１５／１技术起草组制定的Ｈ２６３标准，它是对甚低码率声视频终端推荐的编码算法标准，基于已有的方法和技术，包括一种硬性规定的标准算法和４种建议的算法。图像格式有ＱＣＩＦ、ｓｕｂ－ＱＣＩＦ格式（１２８×９６）和ＣＩＦ，ＣＩＦ是非硬性规定格式。Ｈ２６３编译码器成本不高，图像质量比Ｈ２６１好，其中有些建议的选项尽管使编码器复杂，但能显著改善图像的质量。ＩＴＵ还规划了Ｈ２６４，这个标准正与ＭＰＥＧ４携手发展。
Introduces the ITU-TSG15 / 1 technical drafting group developed H 263 standard, it is recommended for very low bit rate audio and video terminal coding algorithm standard, based on existing methods and techniques, including a standard hard-defined algorithm and 4 Proposed algorithm. The image format QCIF, sub-QCIF format (128 × 96) and CIF, CIF is a non-mandatory format. H.226 Codecs are not expensive and have better image quality than H.226, with some of the suggested options that significantly improve the quality of the image despite the complexity of the encoder. The ITU also plans H.264, a standard that is working hand in hand with MPEG4.