Method and system for a user to manually alter the quality of a previously encoded video sequence
June 6, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesRecording system for recording on a ROM image signal information which has been subjected to efficient redundancy coding Apparatus for video data quantization control Data compression using a feedforward quantization estimator Image data compressing/coding apparatus Apparatus for compression encoding video signals Device and method for editing signals recorded on disk Apparatus and method for recording digital data with a controlled data compression ratio System for generating multiple aspect ratio video signals from motion picture disk recorded in a single aspect ratio Process, apparatus, and system for encoding and decoding video signals Patent #: 5493514 Inventors
ApplicationNo. 469370 filed on 06/06/1995US Classes:370/521, Time compression or expansion375/240.04, Feed forward375/240.24, Block coding382/232IMAGE COMPRESSION OR CODINGExaminersPrimary: Kizou, HassanAssistant: Yao, Kwang Bin Attorney, Agent or FirmForeign Patent References
International ClassH04N 005/76AbstractA method and system in which a user manually changes the quality of specific time periods of encoded video. After the automatic encoding of video into a compressed digital format, a person editing the encoded video reviews the quality of the video and manually indicates that the quality of specific time periods of the video is to be altered. As the digital storage medium such as an optical disc which stores the encoded video has a finite storage capacity, the total number of bits for the encoded video and the quality of the video is limited. Consequently, in order to increase the quality for one time period, bits must be taken from other time periods. After the editor assigns the qualities to different time periods, a percentage of bits is removed from the time sequences and placed into a bit pool. The new number of bits for the various time periods are calculated using an exponential function and the bits in the bit pool are proportionally distributed to the video frames. The frames must then be checked and possibly adjusted to assure that underflow of the video buffer will not occur. After the underflow checking procedure, the video is re-encoded with an adjusted quantization in accordance with a quantizer model which will result in a picture having the calculated number of bits and a quality in accordance with the user's selection.Other References
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