kyanh2007
25-06-2010, 12:51 PM
Tình cờ, em upload 1 file hình ảnh có đuôi là *.Jpeg lên thư viện ảnh thì hệ thống thông báo là phải upload file với đuôi *.jpg. Em hơi ngạc nhiên vì cả 2 đều là file hình ảnh và kiểm tra lại thì 2 định dạng file này là giống nhau, vậy tại sao VNPT không cho phép upload file *.jpeg mà phải là *.jpg? Em không rành về chuyên sâu giữa sự khác biệt này, có bác nào tư vấn thêm không ạ?
Em kiếm được trên wikianswer
"JPEG stands for Joint Photographic Experts Group. JPG (pronounced jay-peg) is the most commonly used file extension used to identify files created with this lossy format, and is the same as .peg. Both JPEG (Joint Photographic Experts Group) and JPG (Joint Photographic Group) are bitmap compression formats for picture and image files with compression ratios ranging from 10:1 to 20:1. In fact, JPG and JPEF file formats are identical. Older DOS-based computers were designed to handle a maximum "3-character file extension" which is why JPG was attributed to compressed image files. Newer Operating systems such as Windows XP and Vista allow for longer file extensions as evidenced by ".html". Accordingly, the JPF file extension was upgraded to the JPEG file extension which is the true acronym for Joint Photographic Experts Group. Just as a side note, XP and Vista will also support the older JPG file extension. "
Em kiếm được trên wikianswer
"JPEG stands for Joint Photographic Experts Group. JPG (pronounced jay-peg) is the most commonly used file extension used to identify files created with this lossy format, and is the same as .peg. Both JPEG (Joint Photographic Experts Group) and JPG (Joint Photographic Group) are bitmap compression formats for picture and image files with compression ratios ranging from 10:1 to 20:1. In fact, JPG and JPEF file formats are identical. Older DOS-based computers were designed to handle a maximum "3-character file extension" which is why JPG was attributed to compressed image files. Newer Operating systems such as Windows XP and Vista allow for longer file extensions as evidenced by ".html". Accordingly, the JPF file extension was upgraded to the JPEG file extension which is the true acronym for Joint Photographic Experts Group. Just as a side note, XP and Vista will also support the older JPG file extension. "