Differential coding method and an apparatus therefor

Details Differential coding method and an apparatus therefor Differential coding method and an apparatus therefor

1994-01-19

1997-03-04

Gaffin, Jeffrey A.

Coded data generation or conversion

Digital code to digital code converters

To or from differential codes

341 50, 348416, H01M 600, H04N 732

Patent

active

056083980

ABSTRACT:
The differential coding apparatus comprises a delay unit for storing an adjacent value, a transmission value conversion unit for assigning a transmission value to a value of difference between the value to be coded and the adjacent value in the ascending order of the absolute value of the difference value, and a variable-length coding device for assigning a code in the order that the code is increasing in code length as the transmission value increases in number. In the range in which positive and negative difference values exist, positive and negative numbers are alternately given to difference values in the order in which the difference value is increasing in distance from a center difference value of 0. In the range in which either positive or negative difference value exists, serial numbers are successively given to difference values in the order in which the difference value is increasing in distance from the difference value of 0. Then codes are assigned in the order of their increasing in code length to the difference values in the order of the given numbers of transmission values.

REFERENCES:
patent: 4727421 (1988-02-01), Koga
patent: 4797653 (1989-01-01), Takayama
patent: 4875095 (1989-10-01), Masumoto et al.
patent: 5361104 (1994-11-01), Ohki
patent: 5428396 (1995-06-01), Yagasaki et al.
patent: 5436626 (1995-07-01), Fujiwara
CCITT Recommendation H. 261, "Video Codec for Audiovisual Services at p x 64 kbit/s", pp. 1-27, (1990).

Affiliated with

Also associated with

Rating

Differential coding method and an apparatus therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2149021