Variable length coding apparatus and method for motion vector

Details Variable length coding apparatus and method for motion vector Variable length coding apparatus and method for motion vector

1992-07-24

1994-03-29

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

341 67, 341106, 375 27, H04N 7157

Patent

active

052989917

ABSTRACT:
A ROM containing a variable length coding table for a 2 picture element range is provided. A motion vector within the range of 2 picture elements is provided to the ROM to produce a VLC code corresponding to the motion vector within the range of 2 picture elements. In a calculation circuit, assuming that the value of a motion vector within the range of 4 picture elements is X, a quotient Y and a remainder Z are obtained by the division of X by 2. The quotient Y is supplied to the ROM and the output of the ROM is added the remainder Z at an addition circuit to obtain a VLC code corresponding to the motion vector lying within the range of 4 picture elements. This is equivalent to variable length coding for a 4 picture element range. By transmitting a flag indicating whether the motion vector range is 2 picture elements or 4 picture elements, the motion vector is correctly reproduced from the VLC code. Accordingly motion vectors within the ranges of 2 picture elements and 4 picture elements can be coded using a single ROM table so that the hardware requirements are reduced.

REFERENCES:
patent: 4995059 (1991-02-01), Ishikawa
patent: 5006929 (1991-04-01), Barbero
patent: 5111294 (1992-05-01), Asai

Affiliated with

Also associated with

Rating

Variable length coding apparatus and method for motion vector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable length coding apparatus and method for motion vector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable length coding apparatus and method for motion vector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-796172