About: Joint Bi-level Image Experts Group

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dbo:abstract	El Grupo JBIG (Joint Bi-level Image Experts Group') es un grupo de expertos auspiciado por entes de normalización y grandes empresas cuyo objetivo es trabajar en la producción de estándares para codificación de imágenes en múltiples capas. El comité reporta tanto a ISO como a ITU-T. El nombre oficial es ISO/IEC JTC1 SC29 Working Group 1, y es responsable de los estándares JPEG y JBIG. JBIG desarrolló el estándar IS 11544 (ITU-T T.82) para compresión de imágenes en múltiples capas. También puede ser utilizada para codificar imágenes en escalas de gris y color con número limitado de bits por pixel. Puede considerarse como una codificación de calidad tipo fax, similar a las codificaciones y , con entre 20 y 80% de mejora en compresión sobre estos métodos (compresión de 20 a 1 con respecto a la imagen sin compresión). La compresión JBIG produce imágenes generalmente más comprimidas que las producidas por TIFF G4. (es) The Joint Bi-level Image Experts Group (JBIG) is a group of experts nominated by national standards bodies and major companies to work to produce standards for bi-level image coding. The "joint" refers to its status as a committee working on both ISO and ITU-T standards. It is one of two sub-groups of ISO/IEC Joint Technical Committee 1, Subcommittee 29, Working Group 1 (ISO/IEC JTC 1/SC 29/WG 1), whose official title is Coding of still pictures. The Joint Bi-level Image Experts Group created the JBIG and JBIG2 standards. The group often meets jointly with the JPEG committee, which typically meets three times annually. ISO/IEC JTC1 SC29 Working Group 1 (working together with ITU-T Study Group 16 – VCEG and previously also with Study Group 8 – SG8) is responsible for both JPEG and JBIG standards. It includes two sub-groups: the Joint Photographic Experts Group (JPEG SG) and the Joint Bi-level Image experts Group (JBIG SG). In the mid-1980s, both CCITT (now ITU-T) and ISO had standardization groups for image coding: CCITT Study Group (SG) VIII (Telematic Services) and ISO TC97 SC2 WG8 (Coding of Audio and Picture Information). They were historically targeted on image communication. In 1986, it was decided to create the Joint (CCITT/ISO) Photographic Expert Group. In 1988, it was decided to create the Joint (CCITT/ISO) Bi-level Image Group – JBIG. (en) Joint Bi-level Image Experts Group (JBIG) は、二値画像の符号化の標準を制定するために、各国の標準化団体および主要企業が指名した専門家集団であり、ISO/IEC JTC 1/SC 29とITU-Tの合同グループである。 (ja)
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rdfs:comment	Joint Bi-level Image Experts Group (JBIG) は、二値画像の符号化の標準を制定するために、各国の標準化団体および主要企業が指名した専門家集団であり、ISO/IEC JTC 1/SC 29とITU-Tの合同グループである。 (ja) The Joint Bi-level Image Experts Group (JBIG) is a group of experts nominated by national standards bodies and major companies to work to produce standards for bi-level image coding. The "joint" refers to its status as a committee working on both ISO and ITU-T standards. It is one of two sub-groups of ISO/IEC Joint Technical Committee 1, Subcommittee 29, Working Group 1 (ISO/IEC JTC 1/SC 29/WG 1), whose official title is Coding of still pictures. (en) El Grupo JBIG (Joint Bi-level Image Experts Group') es un grupo de expertos auspiciado por entes de normalización y grandes empresas cuyo objetivo es trabajar en la producción de estándares para codificación de imágenes en múltiples capas. El comité reporta tanto a ISO como a ITU-T. El nombre oficial es ISO/IEC JTC1 SC29 Working Group 1, y es responsable de los estándares JPEG y JBIG. La compresión JBIG produce imágenes generalmente más comprimidas que las producidas por TIFF G4. (es)
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