The Intel JPEG library (IJL) will not be updated and is no longer available for download. To download IPP 7.0 -http://software.intel.com/en-us/articles/intel-ipp/
Also, you can see response in the forum for similar request.
To get IPP JPEG sample code - http://software.intel.com/en-us/articles/intel-integrated-performance-primitives-code-samples/
HI Jet Zhang
As long as you keep the valid license agreement from old Intel JPEG library, you can follow the guidelines for your product distributions. I found discussion on the same in IPP forum. Hope it clarifies your question.