Broadcasting video content to devices having different video presentation capabilities
Frames of broadcast video received at a device are cropped to produce rendered frames on a display of the device, the cropping being based on both (a) a predetermined value indicating a location within each of at least some of the frames with respect to which the cropping is to be done and (b) a characteristic of the display.
1. A method comprising
sending to a handheld device that has a display, a digital video frame that has an original pixel resolution, and a region of interest,
the display of the handheld device having a substantially lower pixel resolution than the original pixel resolution of the digital video frame, and
also sending to the handheld device a directive that is associated with the region of interest and from which the hand-held device can display the region of interest at the original pixel resolution and centered in the display of the handheld device, without the handheld device requiring any other information about the shape of the region of interest.
2. The method of claim 1 in which the directive comprises a centroid of the region of interest.
3. The method of claim 1 also including sending the directive by embedding the directive in a video that includes the digital video frame.
4. The method of claim 1 in which the region of interest comprises foreground pixels of the digital video image.
5. The method of claim 1 in which the region of interest is based on a moving object or region in a video that includes the digital video frame.
6. The method of claim 1 in which the region of interest is based on pan and scan vectors of a video that includes the digital video frame.
7. The method of claim 1 in which the region of interest is based on a face appearing in a video that includes the digital video frame.
8. The method of claim 1 in which the region of interest is based on the existence of small-font text on a periphery of the digital video frame.
9. The method of claim 1 in which the lower pixel resolution comprises ¼ or fewer of the number of pixels in the original pixel resolution.
10. The method of claim 1 in which the lower pixel resolution is sufficiently lower than the original pixel resolution so that if the entire digital video frame were displayed on the handheld device, details of interest in the region of interest would not be acceptably visible to a user of the handheld device.