When transmitted, emoji symbols are specified as a two-byte sequence, in the private-use range E63E through E757 in the Unicode character space, or F89F through F9FC for Shift JIS.
(See also Models of communication.) For example, people in China have developed a system for using emoji subversively, so that a smiley face could be sent to convey a despising, mocking, and even obnoxious attitude, as the orbicularis oculi (the muscle near that upper eye corner) on the face of the emoji does not move, and the orbicularis oris (the one near the mouth) tightens, which is believed to be a sign of suppressing a smile.The second problem, on the other hand, has to do with technology and branding.(whose Yasuo Kida and Peter Edberg joined the first official UTC proposal for 607 characters as coauthors in January 2009), went through a long series of commenting by members of the Unicode Consortium and national standardization bodies of various countries participating in ISO/IEC JTC1/SC2/WG2, especially the United States, Germany, Ireland (led by Michael Everson), and Japan; various new characters (especially symbols for maps and European signs) were added during the consensus-building process.Encoding in the Unicode standard has allowed emoji to become popular outside Japan.The core emoji set in Unicode 6.0 consisted of 722 characters, of which 114 characters map to sequences of one or more characters in the pre-6.0 Unicode standard, and the remaining 608 characters map to sequences of one or more characters introduced in Unicode 6.0.
There is no block specifically set aside for emoji – the new symbols were encoded in seven different blocks (some newly created), and there exists a Unicode data file called Emoji that includes mappings to and from the Japanese vendors' legacy character sets.They are much like emoticons, but emoji are actual pictures instead of typographics.Kurita took inspiration from weather forecasts that used symbols to show weather, Chinese characters and street signs, and from manga that used stock symbols to express emotions, such as lightbulbs signifying inspiration.When an author of a message picks an emoji from a list, it is normally encoded in a non-graphical manner during the transmission, and if the author and the reader do not use the same software or operating system for their devices, the reader's device may visualize the same emoji in a different way.Small changes to a character's look may completely alter its perceived meaning with the receiver.Some emoji have been involved in controversy due to their perceived meanings.