Hierarchical entropy coded lattice threshold quantization encodi

Details Hierarchical entropy coded lattice threshold quantization encodi Hierarchical entropy coded lattice threshold quantization encodi

1991-05-10

1992-09-22

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358135, 358136, H04N 712

Patent

active

051502097

ABSTRACT:
A method and apparatus for encoding interframe error data in an image transmission system, and in particular in a motion compensated image transmission system for transmitting a sequence of image frames from a transmitter to a receiver, employ hierarchical entropy coded lattice threshold quantization to increase the data compression of the images being transmitted. The method and apparatus decimate an interframe predicted image data and an uncoded current image data, and apply hierarchical entropy coded lattice threshold quantization encoding to the resulting pyramid data structures. Lossy coding is applied on a level-by-level basis for generating the encoded data representation of the image difference between the predicted image data and the uncoded original image. The method and apparatus are applicable to systems transmitting a sequence of image frames (or other pattern data, such as speech) both with and without motion compensation.

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