Omission and subsequent estimation of zero sequency coefficients

Details Omission and subsequent estimation of zero sequency coefficients Omission and subsequent estimation of zero sequency coefficients

1983-10-14

1986-12-30

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358133, 358138, H04N 516, H04N 1102

Patent

active

046332960

ABSTRACT:
A method of transmission or storage of a television picture involves dividing it into a plurality of blocks, subjecting them individually to a two-dimensional unitary transformation, transmitting or storing the transform coefficients and reconstructing the original blocks by the use of the inverse transformation. To reduce the data rate, the zero sequency coefficient is omitted for most or all the blocks, and the mean levels of the reconstructed blocks are adjusted to reduce visible brightness changes between them. The adjustment may be made to reduce the means square differences between the elements in two blocks along the common boundary. The division into blocks may give common elements in two blocks along each inter-block boundary. If a picture transition coincides with a block division an indication of this may be sent so that differences between elements along the division are ignored.

REFERENCES:
patent: 3984626 (1976-10-01), Mounts
patent: 4189748 (1980-02-01), Reis
patent: 4281344 (1981-07-01), Mounts
patent: 4504860 (1985-03-01), Nicol et al.
patent: 4510578 (1985-04-01), Miyaguchi
patent: 4517597 (1985-05-01), Glenn
Soft Decision Demodulator and Transform Coding of Images, R. C. Reiniger et al, IEEE International Conference on Communications, Conf. Record, vol. 2 of 3, Jun. 13-17, 1982, pp. 4H.3.1.-4H.3.6.
Lowpass Filtering in the Cosine Transform Domain--King Ngi Ngan, International Conference on Communications/Conference Record (ICC'80) vol. 2 of 3, Jun. 18-12, 1980, pp. 31.7.1-37.7.5.
A Real Time Video Bandwidth Reduction System Based on a CCD Hadamard Transform Device--D. J. Spencer, et al, Proc. IEEE 1979, National Aerospace & Electronics Conference NAECON 1979, vol. 3, May 15-17, 1979, pp. 1218-1231.
Channel Error Recovery for Transform Image Coding Mitchell et al, IEEE Trans on Comm, COM-29, 12, Dec. 1981, pp. 1754-1762.
Transmission Techniques for Picture Prestel--Nicol, et al, The Radio and Electronic Engineer, 51, 19, Oct. 1981, pp. 514-518.
Adaptive Coding of Monochrome and Colour Images--Chen et al, IEEE Trans on Comm, COM-25, 11 Nov. 1977, pp. 1285-1292.

Affiliated with

Also associated with

Rating

Omission and subsequent estimation of zero sequency coefficients does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Omission and subsequent estimation of zero sequency coefficients, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Omission and subsequent estimation of zero sequency coefficients will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1551191