TV picture compression and expansion

Details TV picture compression and expansion TV picture compression and expansion

1994-12-12

1997-06-24

Powell, Mark R.

Television

Bandwidth reduction system

Data rate reduction

348581, H04N 726

Patent

active

056421672

ABSTRACT:
Many-to-one and one-to-many digital image transformations play a significant role in a variety of imaging communications, visualization, and robotic applications. A method is presented for forwarding mapping frames of TV images in a many-to-one mapping using run length encoding. A digital computer system includes a look-up table memory having the address of each input run-length of pixels (a series of side-by-side pixels) and the address of the single output pixel corresponding thereto. An example is a 512.times.512 pixel TV frame which, in real time, is mapped onto a log polar coordinate TV frame of 2000-3000 pixels. This method can be used with existing low-cost general purpose computers providing a speed advantage approximating five-hundred percent, and a memory savings of between 10 and 100,000 times, relative to the current art. As a result, electronic imaging systems employing many-to-one or one-to-many image warps may be built in significantly smaller, cheaper, faster and lower power implementations.

REFERENCES:
patent: 4975771 (1990-12-01), Kassatly
patent: 5008752 (1991-04-01), Van Nostrand
patent: 5067019 (1991-11-01), Juday et al.
patent: 5175617 (1992-12-01), Wallace et al.

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