Television – Bandwidth reduction system – Data rate reduction
Patent
1993-12-27
1995-06-27
Britton, Howard W.
Television
Bandwidth reduction system
Data rate reduction
341 67, 341106, 348699, 375245, H04N 7137
Patent
active
054283965
ABSTRACT:
In connection with compression-coding of video signals on the basis of inter-frame correlation, a single reference table is used for variable length encoding of inter-frame motion vectors established on the basis of various motion vector value ranges and degrees of accuracy. A reference table is provided for variable length encoding motion vectors based on a particular value range and degree of accuracy. In order to use the same table for motion vectors based on a larger value range than that for which the table was designed, the value of a motion vector to be encoded is divided to form a quotient and a remainder. An addition bit code is formed on the basis of the remainder and is appended to a variable length code which corresponds in the reference table to the quotient so that a variable length code value is formed for the motion vector based on the larger range. As to motion vectors based on a finer degree of accuracy than was provided for in the reference table, the motion vector value is multiplied by an appropriate factor and the resulting product is used to obtain a corresponding variable length code value from the reference table. Decoding is performed using the same table and by means of decoding operations that are the inverse of the encoding operations.
REFERENCES:
patent: 4995059 (1991-02-01), Ishikawa
patent: 5006929 (1991-04-01), Barbero
patent: 5111294 (1992-05-01), Asai
patent: 5132792 (1992-07-01), Yonemitsu
patent: 5298991 (1994-03-01), Yagasaki
Igarashi Katsuji
Kato Motoki
Veltman Mark
Yagasaki Yoichi
Yonemitsu Jun
Britton Howard W.
Frommer William S.
Sinderbrand Alvin
Sony Corporation
LandOfFree
Variable length coding/decoding method for motion vectors 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/decoding method for motion vectors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable length coding/decoding method for motion vectors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-290567