Method of processing data in internet protocol television receiver and internet protocol television receiver

Abstract

A method of processing data in an IPTV receiver and such an IPTV receiver are disclosed. The method includes transmitting a request signal for resolution of a content reference identifier (CRID) corresponding to a content, receiving location information including a session initiation protocol-uniform resource identifier (SIP-URI) and a session description protocol-uniform resource locator (SDP-URL), wherein the SIP-URI and the SDP-URL correspond to the CRID, requesting a server corresponding to the SDP-URL to transmit a session description protocol (SDP) file by using the received SDP-URL, and receiving the SDP file from the server.

What is claimed is: 
     
       1. A method of retrieving at least one parameter of a SDP (session description protocol) file prior to a session setup in an open IPTV terminal function (OITF) receiver, the method comprising:
 performing a content reference identifier (CRID) location resolution process of mapping a CRID to either other CRIDs or a location information, wherein the location information provides additional data to retrieve the content; 
 retrieving the at least one SDP parameter prior to the session setup, the retrieving comprising:
 firstly requesting by the OITF receiver to an Internet protocol multimedia subsystem Gateway (IG) on a home network interface-IG interface (HNI-IGI) interface, the at least one SDP parameter; 
 secondly requesting by the IG to a network, the at least one SDP parameter; 
 retrieving, by the IG, the at least one SDP parameter from the network; 
 forwarding the at least one SDP parameter from the IG to the OITF receiver; and 
 
 performing the process of the session setup after the OITF receiver has retrieved the at least one parameter, 
 wherein the location information is defined in a Time And uniform resource locator (URL) Type schema of broadband content guide (BCG) information, and the Time And URL Type schema additionally defines SDP mode attribute information identifying a mode for delivery of the content, and SDP-URL attribute information indicating a URL that provides the content. 
 
     
     
       2. A computer-readable recording medium for recording a program for execution of the method of  claim 1 . 
     
     
       3. An open IPTV terminal function (OITF) receiver of retrieving at least one parameter of a SDP (session description protocol) file prior to a session setup, the OITF receiver comprising:
 a performing unit configured to perform processor that performs a content reference identifier (CRID) location resolution process of mapping a CRID to either other CRIDs or a location information, wherein the location information provides additional data to retrieve the content; 
 a retrieving unit configured to retrieve processor that retrieves the at least one SDP parameter prior to the session setup, the retrieving comprising:
 firstly requesting by the OITF receiver to an Internet protocol multimedia subsystem Gateway (IG) on a home network interface-IG interface (HNI-IGI) interface, the at least one SDP parameter; 
 secondly requesting by the IG to a network, the at least one SDP parameter; 
 retrieving, by the IG, the at least one SDP parameter from the network; 
 
 forwarding the at least one SDP parameter from the IG to the OITF receiver; and 
 a controlling unit configured to perform processor that performs the process of the session setup after the OITF receiver has retrieved the at least one SDP parameter, 
 wherein the location information is defined in a Time And uniform resource locator (URL) Type schema of broadband content guide (BCG) information, and the Time And URL Type schema additionally defines SDP mode attribute information identifying a mode for delivery of the content, and SDP-URL attribute information indicating a URL that provides the content.