| 摘要 |
A network device sends a first set of images associated with an electronic program guide (EPG) to a client device. The network device determines that an image of the first set of images has been modified, and receives one or more calls for displaying the first set of images at the client device. The network device sends the modified image, or one or portions of the image that have been modified, to the client device without sending a remainder of the images in the first set of images, or without sending the remaining portions of the image.
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