公开(公告)号：US07808522B2

公开(公告)日：2010-10-05

申请号：US10373062

申请日：2003-02-26

Applicant: Yufeng Zhang ,  Liquan Zhang ,  Yanqing Lin ,  Liu Fang ,  Jun Li

Inventor： Yufeng Zhang ,  Liquan Zhang ,  Yanqing Lin ,  Liu Fang ,  Jun Li

IPC: H04N7/14

CPC classification number: H04L65/1009 ,  H04L12/1813 ,  H04L65/4038 ,  H04M3/56 ,  H04M2203/5063 ,  H04N7/15

Abstract: The invention discloses a method for calling video communication service by video communication terminal. The method comprises the steps of: (a) a first video communication terminal launches a call to a multipoint control unit (MCU) and sends an conference information needed for convening a conference to the MCU through an In-Band channel established between both sides; (b) the MCU convenes the conference according to the conference information received. The invention also discloses a message data form for transferring information through an In-Band channel in a video communication service. The message data form comprises: a data starting mark field, a data type field, a data length field, a field for no less than one piece of sub-information, a data ending mark field and a cyclic redundancy check field.

Abstract translation: 本发明公开了一种视频通信终端呼叫视频通信业务的方法。 该方法包括以下步骤：（a）第一视频通信终端通过双方建立的带内信道向多点控制单元（MCU）发起呼叫，并向MCU发送召集会议所需的会议信息; （b）MCU根据收到的会议信息召集会议。 本发明还公开了一种用于通过视频通信业务中的带内频道传送信息的消息数据形式。 消息数据形式包括：数据起始标记字段，数据类型字段，数据长度字段，用于不少于一条子信息的字段，数据结束标记字段和循环冗余校验字段。