EPG-conditioned letterbox-to-anamorphic conversion
View Patent ↗Designed for use with widescreen TVs or high-end TVs with a mode for accommodating anamorphic programs, an EPG client is equipped with an electronic program guide (EPG) and a letterbox-to-anamorphic converter. The EPG client evaluates EPG data to determine whether programs are in the letterbox format. When a letterboxed program is selected for viewing, the EPG client vertically stretches the program by a ratio of M/N, where M>N (e.g., 4/3), to convert the program from the letterbox format to an anamorphic format prior to delivery to the television. The converted anamorphic program is output to the television, where it is horizontally expanded to fit the screen.
1. A method for operating a client device that interfaces a television with a television network, comprising:
receiving a viewer request for a program;
examining program data in an electronic program guide executing at the client device to ascertain whether the program requested by the viewer is in letterbox format;
determining whether the television is capable of supporting anamorphic programs; and
in an event that the program is in letterbox format and the television is capable of supporting anamorphic programs, converting the program from the letterbox format to anamorphic format prior to output to the television.
2. A method as recited in claim 1 , wherein the examining comprises checking a format field in the program data to identify whether programs are marked as being anamorphie.
3. A method as recited in claim 1 , wherein the determining comprises ascertaining from user settings whether the television is capable of supporting anamorphic programs.
4. A method as recited in claim 1 , wherein the convening comprises vertically stretching the program by a ratio of 4/3.
5. A method as recited in claim 1 , wherein the converting comprises vertically stretching the program by a ratio of M/N, where M>N.
6. A method as recited in claim 1 , wherein the converting comprises using multiple polyphase filters to resample the program.
7. A method as recited in claim 1 , further comprising receiving the program data as part of a broadcast feed.