Patent ID: 6473558
Filing Date: 2002-10-29
Classification: H04N

Abstract:
A method of displaying a series of video frames in reverse order, wherein the video frames are received in groups from a storage medium, wherein the groups are received in reverse chronological order, and wherein each group comprises a chronologically ordered set of video frames, the method comprising:a first write pointer advancing through N frame buffers, numbered from 1 to N, in ascending order from 1 to N, wherein N is an integer greater than 1; a second write pointer advancing through the N frame buffers in descending order from N to 1, wherein the second write pointer advances through the N frame buffers at the same time as the first write pointer advances through the N frame buffers; sequentially storing N video frames from each successively received group into the N frame buffers, wherein the N video frames from each of the successively received groups make up the series of video frames, wherein said sequentially storing comprises alternating between storing successive video frames in the series into one of the N frame buffers currently indicated by the first write pointer and into one of the N frame buffers currently indicated by the second write pointer; sequentially retrieving the N frames of each group from the N frame buffers in an opposite numerical order of an order in which the N frames of that group were stored into the N frame buffers; and displaying the N frames of each group in the order in which the N frames are retrieved.