Variable length code processor and image processor having an int

Details Variable length code processor and image processor having an int Variable length code processor and image processor having an int

1997-06-02

1999-08-03

Vu, Kim Yen

Image analysis

Image compression or coding

Lossless compression

382233, 382245, 341 67, G06T 900

Patent

active

059335360

ABSTRACT:
In a variable length code processor or image processor for encoding data to be coded into a variable length code corresponding to its run length and level, and decoding a variable length code to be decoded into a corresponding run length and level, there are provided a first memory for storing a variable length coding table which outputs a variable length code using its run length and level as input, a first shifter which applies a bit shift to the variable length code output by the first memory based on its length, a second memory for storing a variable length decoding table which outputs a run length and level using a variable length code as input, and a second shifter which applies a bit shift to the variable length code to be decoded based on the length of the variable length code decoded on the immediately preceding occasion, and supplies it to the second memory as input. Due to the fact that the first and second shifters are identical, the processor may be made more compact and may be manufactured at lower cost.

REFERENCES:
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patent: 5245338 (1993-09-01), Sun
patent: 5263135 (1993-11-01), Dei
patent: 5550541 (1996-08-01), Todd
patent: 5696506 (1997-12-01), Yu
patent: 5767799 (1998-06-01), Maertens et al.

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