Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1981-06-29
1983-08-09
Orsino, Jr., Joseph A
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358133, 382 56, H04N 712
Patent
active
043982174
ABSTRACT:
A method of and arrangement for digitizing a video signal using a picture transform coding, wherein a group of N video signal samples is converted into a group of N coefficients y(m) wherein m=1, 2, 3, . . . N which are each adaptively encoded.
In order to prevent a coefficient y(m) which is on average small to very small, from being insufficiently accurately encoded, or not encoded at all, when it is occasionally large, the group of coefficients is compared with a number of fixed classification groups A(j) each consisting of M elements a(j,m), wherein a(j+l,m).gtoreq.a(j,m) and j=1, 2, 3, . . . M. The j is determined in such manner that y(m)<a(j,m) for all m.
A bit-assignment group B(j) having elements b(j,m) is associated with each classification group A(j) and each one of the N coefficients y(m) is now converted into a code word z(m) which contains a number of bits which is characterized by b(j,m) and which is, for example, equal to the value of b(j,m).
REFERENCES:
patent: 3984626 (1976-10-01), Mounts et al.
patent: 4179709 (1979-12-01), Workman
Limb et al.-Digital Differential Quantizer For Television-vol. 48 1969, pp. 2583-2599.
Chen et al.-Adaptive Coding of Monochrome and Colour Images IEEE Trans on Comm.-vol. Com. 25-No. 11-Nov. 1977-pp. 1285-1292.
Wintz-Transform Picture Coping-Proc of IEEE-vol. 60-No. 7, Jul. 1972-pp. 809-820.
TTL Data Book, Texas Instruments-No. LCC 4112-the IC Tyne No. Sn 74 LS 148.
Fukunuki et al.-Intraframe Image Coding by Cascaded Hadaward Transforms-vol. Com-21, No. 3, Mar. 1973, pp. 175-180.
Special Issue on Analog Digital Conversion-IEEE Trans on Circuits and Systems-vol. Cas-25-No. 7, Jul. 1978.
CCITT Recommendation G-751-vol. III-2, pp. 469-477.
Briody Thomas A.
Orsino, Jr. Joseph A
Streeter William J.
U.S. Philips Corporation
Wright Laurence A.
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