Method for compressing dynamic image information and system and

Details Method for compressing dynamic image information and system and Method for compressing dynamic image information and system and

1997-10-31

2000-07-04

Lee, Young

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

348403, 348420, H04N 712

Patent

active

060849134

ABSTRACT:
A method and system for compressing dynamic image information includes a divider which divides each frame of dynamic image data of 16 frames into 4.times.4 pixel blocks that are non-overlapping. A first zigzag scanner arranges each of the blocks in the order of the frames to form a 16.times.16 block. A two-dimensional orthogonal transformer subjects the 16.times.16 block to a two-dimensional DCT to encode the units of the block in a frequency band. A quantizer multiplies the 16.times.16 data by quantization coefficients to approximate the value of the data at discrete levels. A second scanner stores the quantized DCT data as a one-dimensional array from low to high frequency components. A variable length encoder then encodes the scanned data.

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Huffman, David A., "A Method for the Construction of Minimum-Redundancy Codes", Proceedings of the I.R.E, pp. 1098-1101, Sep. 1952.

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