Abstract: A method and system for encoding and recording data in a multi-stream format when the data is initially captured. The multiple streams of data can be combined to provide a high quality, or high resolution, representation, while a reduced subset of the streams can provide a lower quality, or lower resolution, representation. Data storage requirements can be reduced, by deleting one or more of the streams, when there is no longer a need for retention of the data at the higher quality.

Abstract: A method and apparatus forming a user interface for examining and retrieving audio/video/data content from digital video recorders. This includes an improved time period selection mechanism, a rich array of temporal data presentations, such as timelines, lists, and thumbnail images, and a unified method of displaying content from either a direct stream or downloaded files. Summary information is provided relating to undownloaded content based on a selected time period.

Abstract: A method and system are provided for counting moving objects in a digital video stream. In contrast to known computationally-expensive methods, areas of motion are determined by threshold subtracting a current video frame from a short term average video scene. An object box surrounding an object is determined by threshold subtracting the current video frame from a long term average video scene. Coordinates of the moving object are identified by associating the area of motion with the object box, if it overlaps the area of motion, to define a moving object box. An event counter can be incremented when the moving object box is in a buffer zone in the current frame, and was in a detection zone in an earlier frame, and was initially detected in a buffer zone on the opposite side of the detection zone.

Abstract: In a computer system, a method for displaying on a display device a user interface used for filtering data in an original data set is disclosed. The original data set is displayed on the user interface in a table format having dimensions and values. A table content constraint system is displayed in conjunction with the table, which includes a constraint bar having at least one filter associated with at least one dimension of the table. In response to actuation of a filter, a filter input area is displayed. A filter input from the filter input area is received from a user. The original data set is filtered according to the filter input, and a modified data set is displayed which is derived by filtering the original data set according to the filter input. The filter input is displayed on the constraint bar.