Alcatel has accused Microsoft of infringing seven of its U.S. patents. The patents describe how to implement fast-forward and rewind functions in digital video streams, among other things.The French networking equipment manufacturer filed two suits with the U.S. District Court for the Eastern District of Texas on Friday, asking the court to rule that Microsoft willfully infringed on the patents. Through its local subsidiary, Alcatel USA Resources of Plano, Texas, the company is seeking an end to the infringement, treble damages, and payment of interest charges and legal costs.Alcatel representatives could not immediately say which Microsoft products are alleged to infringe on Alcatel\u2019s patents. Microsoft representatives in Europe referred questions to their colleagues in the United States.The first suit concerns three patents: numbers 6,339,830 and 6,874,090, both titled "Deterministic User Authentication Service for Communication Network," and number 6,661,799, titled "Method and Apparatus for Facilitating Peer-to-Peer Application Communication."The other covers four patents: number 6,823,390, "Method of Setting Up Data Communication With\u00a0a Communication Means and Furthermore Program Modules and Means Therefore"; number 6,112,226, "Method and Apparatus for Concurrently Encoding and Tagging Digital Information for Allowing Non-Sequential Access During Playback"; number 5,864,682, "Method and Apparatus for Frame Accurate Access of Digital Audio-Visual Information"; and number 5,659,539, "Method and Apparatus for Frame Accurate Access of Digital Audio-Visual Information."Patent number 5,864,682 describes how to implement functions such as fast forward, rewind and jumping to a specific point within a digital video stream. Microsoft\u2019s Internet television platform, Microsoft TV IPTV Edition, includes a digital video recorder with such functions. Microsoft worked with Alcatel to develop the platform.Microsoft also faces a patent lawsuit from Lucent Technologies, which Alcatel is in the process of buying. Lucent sued Microsoft in March, claiming that the Xbox 360 game console\u2019s ability to play MPEG-2 video files infringed on its patent number 5,227,878, "Adaptive Coding and Decoding of Frames and Fields of Video."-Peter Sayer, IDG News Service (Paris Bureau)Related Link:\n\nAlcatel, Lucent Report Rising RevenueThis article is posted on our Microsoft Informer page.\u00a0For more news on the Redmond, Wash.-based powerhouse, keep checking in.Check out our CIO News Alerts and Tech Informer pages for more updated news coverage.