H.261

(redirected from H261)

H.261

(networking, standard)
A video compression standard developed by ITU-T before 1992 to work with integrated service digital network. Data is compressed at the rate of 64P kilobits per second, where P can range from 1 to 30 depending on the number of ISDN channels used. This standard was developed primarily to support video phones and video conferencing.

See also ivs.

http://crs4.it/~luigi/MPEG/mpeggloss-h.html#H.261.

H.261

An ITU standard for compressing an H.320 video transmission. The algorithm can be implemented in hardware or software and uses intraframe and interframe compression. It uses one or more 64 Kbps ISDN channels (Px64). H.261 supports CIF and QCIF resolutions. See H.323, CIF and codec.
References in periodicals archive ?
Trastornos H25 Catarata senil H250 Catarata senil del incipiente cristalino H251 Catarata senil nuclear H252 Catarata senil, tipo morgagnian H258 Otras cataratas seniles H259 Catarata senil no especificada H26 Otras cataratas H260 Catarata infantil, juvenil y presenil H261 Catarata traumatica H262 Catarata complicada H263 Catarata inducida por drogas H264 Catarata residual H268 Otras formas especificadas de catarata H269 Catarata no especificada H27 Otros H270 Afaquia trastornos del cristalino H271 Luxacion del cristalino H278 Otros trastornos especificados del cristalino H279 Trastorno del cristalino no especificado H28 * Catarata y H280 * Catarata diabetica otros (E10-E14 [cruz], con trastornos del cuarto caracter cristalino en comun .
722 HD, GSM, Speex, H261, H263, H263p, H264, MPEG4.
DCT and IDCT (Inverse DCT) functions are the building blocks of JPEG, MPEG, and ITU-T H261 standards-based codecs that are used in many image processing applications.