Abstract: Transcoder apparatus for transcoding an input video bit-stream having a first encoding profile (e.g., MPEG-2) into an output video bit-stream having a second encoding profile (e.g., H.264), the first encoding profile including motion estimation information, the apparatus including: a front-end for extracting the motion estimation information from the input video bit-stream, and a back-end for constructing the output bit-stream. The front-end and the back-end of the apparatus are interconnected (e.g., via a buffer) to pass the motion estimation information from the front-end to the back-end, thereby avoiding motion estimation in constructing the output bit-stream at the apparatus back-end.

Abstract: Binary words are converted between a non-encoded format and a compressed encoded format, in which the binary words are, at least in part, represented by encoded bit sequences that are shorter than the respective binary word in the non-encoded format. The shortest encoded bit sequences are selected according to the statistical recurrence of the respective words in the non-encoded format, and associated with the binary words with higher recurrence are encoded bit sequences comprising bit numbers that are accordingly smaller. The correspondence between binary words in non-encoded format and the encoded bit sequences associated to them is established by means of indices of an encoding vocabulary. The conversion process includes: arranging the indices in an ordered sequence; organizing the sequence into groups of vectors; splitting each group into a given number of vectors; and encoding the vectors independently from one another.

Abstract: Binary words are converted between a non-encoded format and a compressed encoded format, in which the binary words are, at least in part, represented by encoded bit sequences that are shorter than the respective binary word in the non-encoded format. The shortest encoded bit sequences are selected according to the statistical recurrence of the respective words in the non-encoded format, and associated with the binary words with higher recurrence are encoded bit sequences comprising bit numbers that are accordingly smaller. The correspondence between binary words in non-encoded format and the encoded bit sequences associated to them is established by means of indices of an encoding vocabulary. The conversion process includes: arranging the indices in an ordered sequence; organizing the sequence into groups of vectors; splitting each group into a given number of vectors; and encoding the vectors independently from one another.