One of compressed systems of still picture data. Name of the specialist organization which is installed by ISO is that way used. The case of compression, somewhat picture quality deterioration is allowed (truncates the data of part) system and, to be possible the fact that the system which completely does not have deterioration is chosen, when it allows, it is possible to appoint which it deteriorates. There is a variation, depending upon system, but bulk compressibility in general 1/10 - 1/100. But effective to the compression in the nature picture of the photograph and the like, it does not face to computer graphics. Connecting the JPEG picture, you call the system of making animated picture Motion-JPEG. Furthermore, JPEG was assumed that it is the picture type which does not have the necessity to pay rent such as patent to the company of everywhere unlike GIF, but the Forgent corporation declared the retention of patent right suddenly in 2002 July and (generally known sub marine patent), claim of rent was started and discussion was called.

JPEG2000

Reading: In Shea peg plug
Field:
Multimedia > graphics > picture type > JPEG2000
Expression of information > file format > JPEG2000

At one of image compression systems, the specification which develops JPEG. It was standardized in 2001 January cooperation organization and JPEG of ISO and ITU-TS which do the standardization of picture encoding (Joint Photographic Experts Group) by.

JPEG of predecessor is standardized with the international standard standard regarding the compression development in the still picture which is enacted in 1990, ISO 10918-1 (ITU-TS T.81) as.

As for JPEG2000 with the standard which decides the system of compression development of the still picture, a higher compression than former JPEG and high quality being able to do image compression is a special feature.

With former JPEG system picture dispersion cosine conversion (DCT: Small blocking dividing the picture quantizing & encoding frequency component factor, the system which it compresses) with it converts, but quantizing & encoding the length and breadth respective frequency component which divided the whole picture into frequency zone, with JPEG2000 [ueburetsuto] conversion (due to [ueburetsuto] function the system which it compresses) with it converts

JPEG-LS <Lossless JPEG>

Reading: Shea peg l s
Alias:
Loss less JPEG
Field:
Multimedia > graphics > picture type > JPEG-LS

One of compressed systems of the still picture data where the reversible compression which does not impair the picture quality of the original picture completely is possible.

But one kind of JPEG which is used in compression of the photograph picture and the like, usual JPEG truncating the data when compressing, with JPEG-LS the completely reversible compression which does not have the deficiency of the data is done vis-a-vis obtaining high bulk compressibility instead of picture quality deteriorating. Bulk compressibility is low, but because picture quality is not impaired altogether, it is used for use such as retention and exchange of the medical application picture. In addition, can be warped the data which is decoded also to do the quasi- reversible compression which can supply inside the range of the error which is appointed with parameter.

JPNIC <The Japanese network information center>

Reading: Shea tweet the nick
Full spelling: JaPan Network Information Center
Field:
Internet > group > JPNIC

Allotment of global IP address is done in the Japanese country, the investigation research and enlightenment education activity regarding Internet is done, the organization which smooth management of Japanese Internet is supported. JNIC of predecessor started in 1991 December, JPNIC (the optional group) to moved in 1993 April, became Corporation in 1997 March.

At the beginning, it did also the allotment of JP domain name and the administration of DNS, but JP domain management business, investing personally, JPRS which you establish (corporation Japanese registry service) was transferred gradually from 2000 extending through 2002. However, even presently, JPNIC has taken charge the promotion of decision of domain name dispute processing policy and investigation research and the standardization regarding internationalization domain name.