公开(公告)号：JP2001292483A

公开(公告)日：2001-10-19

申请号：JP2001036936

申请日：2001-02-14

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FARUK MEHMET ,  WU JIAN JUN ,  YAN RAN-HONG

IPC: H04N7/26 ,  H04B7/00 ,  H04L1/00 ,  H04L12/28 ,  H04L29/06 ,  H04L29/08 ,  H04N7/08 ,  H04N7/081 ,  H04N7/24 ,  H04W28/22 ,  H04Q7/38

Abstract: PROBLEM TO BE SOLVED: To provide a method and device for coding a video data stream that a mobile communication system can efficiently transmit the video data stream. SOLUTION: The method and device for coding a video data stream in the GPRS, EDGE or UMTS system and performing a real time video service includes a step where one of a small number, e.g. 4 channel coding rates applicable to video in a prescribed way is selected, a step where the rate is applied to video data in the application layer, and a step where the data are transmitted to a mobile system via a wireless interface together with a header and a temporary flow indicator denoting the selected coding rate. Employing a short header can increase the video payload capacity. One of the prescribed channel coding rates is a 1/1 rate, that is, a transparent rate.