Patent ID: 6327421
Filing Date: 2001-12-04
Classification: G06T,H04N

Abstract:
A method for realizing a fast play of a digitally compressed picture sequence, comprising the steps of:a) storing a bitstream of an original sequence of pictures;b) selecting every nth picture from said original sequence of pictures;c) creating an ancillary bitstream by encoding said every nth picture as an I-picture, while ensuring that all encoded I-pictures have equal numbers of bits, where an I-picture is a digitally encoded picture that can be decoded without resort to another digitally encoded picture;d) storing said ancillary bitstream;e) maintaining a table that associates a place in an audio stream with a boundary of a group of pictures;f) employing said table to enable accessing of audio play data that corresponds to said group of pictures;g) responding to a client request for a fast play of said sequence of pictures by selecting a subset of said I-pictures from said stored ancillary bitstream for transmission to said client; andh) multiplexing said subset of pictures with padding data to replace absent audio data.