초록 ▼

A method and system in which a user manually changes the quality of portions of video frames after the frames have been previously encoded. Regions of one or more frames of video are selected to have an increased quality, a decreased quality, or a quality which should not be altered. After the regio

A method and system in which a user manually changes the quality of portions of video frames after the frames have been previously encoded. Regions of one or more frames of video are selected to have an increased quality, a decreased quality, or a quality which should not be altered. After the regions are defined by a user, the frame of video is digitally re-encoded and inserted into the digitally encoded data stream in place of the previously encoded data. In order to easily remove a previously encoded frame from the data steam and replace it with a newly encoded frame having regions of quality defined by the user, it is preferable to have the newly encoded frame consume the same number of bits as the previously encoded frame. Accordingly, if the user desires a region of a frame to have an increased quality, the extra bits necessary to provide the increased quality must be taken from other areas of the frame. This is accomplished by an automatic process which is transparent to the user. Additionally, if the user wants to change the quality of an object for a series of video frames, the user can mark a region in a first frame and a corresponding region in a last frame and the system will automatically adjust the quality of the region as the region moves through the series of video frames.

대표청구항 ▼

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] A method of controlling quality of digitally encoded video, comprising the steps of:encoding a frame of video into a digitally compressed format using quantizer values which control a number of bits u

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] A method of controlling quality of digitally encoded video, comprising the steps of:encoding a frame of video into a digitally compressed format using quantizer values which control a number of bits used to represent said frame of video;identifying regions of the frame of the encoded video having qualities which are to be changed;determining at least one of new quantizer values for said regions which control a number of bits used to represent said frame of video and new numbers of bits for said regions, using the identified regions and a previously determined number of bits; andre-encoding said frame of video into the digitally compressed format using said at least one of new quantizer values and new numbers of bits for said regions.