Many web sites customize content for the particular interests or location of the user. Similar techniques can be used to localize enhanced television content authored with the ATVEF specification. ATVEF Transport B presents interesting challenges. TRANSPORT A - USER DIRECTED "STATION SELECTOR" This is by far the simplest approach, since techniques and tools already exist within existing web sites. www.pbs.org uses this approach to allow the user to customize the national content to include their local station logo, schedule and program promotion. SERVES Viewers with ATVEF Transport A receivers, both analog and digital. INGREDIENTS Traditional web server with customization based on a user cookie. INSTRUCTIONS - National producer includes "station selector" in all enhancements, allowing user to insure that future enhancements that include local customization will appear automatically. - Receive topic and template from national producer. - Author local content within the template. - Send local content to national server. - Test content during the broadcast. TRANSPORT A - AUTOMATIC Users may not bother to use the "station selector". An automatic process is better. In this model, the local trigger could be used to fill an off-screen frame within the ATVEF web-browser, that would be subsequently displayed by the instructions in the national content. SERVES Viewers with ATVEF Transport A receivers, both analog and digital. INGREDIENTS - Line 21 processor. This device needs to monitor ATVEF triggers appearing in Line 21, and replace certain triggers based on a station-programmable lookup table. INSTRUCTIONS - Receive topic, content template and trigger codes from national producer. - Author local content within the template. - Program line 21 processor to replace appropriate triggers with trigger pointing to local content. - Test content during the broadcast. TRANSPORT B If the content is delivered entirely with the digital broadcast (transport B), it is not possible to use traditional web customization techniques. Instead, the localized content must be inserted locally. SERVES Viewers with Transport B DTV receivers. INGREDIENTS Complete Transport B enhancement insertion system. (See Recipes:ATVEF Transport B) INSTRUCTIONS - ISOLATED LOCAL ENHANCEMENTS The simplest approach is to leave a portion of the program without national enhancements, for insertion of local enhancements. - Receive topic, template and time code numbers from national producer. - Produce and test local enhancements. - Program enhancement trigger to occur for the proper time period. - Configure insertion system to insert local enhancements during the proper time period of the program. INSTRUCTIONS - CONTINOUS LOCAL/NATIONAL ENHANCEMENTS If it is desired to have both local and national enhancements throughout the program, the national enhancements will need to be designed to be modified locally. - Receive topic and templates from the national producer. - Receive national enhancement content well in advance of the broadcast. - Modify the enhancement code to include local enhancements. - Configure the insertion system to insert entire content package- blanking any enhancements on the national feed, if present. Revised Wednesday, 01-Aug-2001 16:09:09 CDT - j © 2000 - 2003 Local Enhancement Collaborative & .