Patent ID: 7974484

Claim:
A Joint Bi-level Image Group (JBIG) coding system, comprising: a first receiver, which receives a datastream that contains at least one pixel and a context corresponding to the pixel; a first lookup table device, which is connected to the first receiver in order to obtain a state and a more probable symbol by looking up a table in accordance with the context; a first static random access memory, which is connected to the first receiver and the first lookup table device in order to store the datastream and the table with a plurality of state fields and more probable symbol field for the first lookup table device to accordingly obtain the state and the more probable symbol by looking up the table in accordance with the context; a second lookup table device, which is connected to the first lookup table device in order to obtain a less probable symbol size, a next less probable symbol, a next more probable symbol and a switch by looking up a probability estimation table in accordance with the state; an encoder, which is connected to the first receiver and the second lookup table device in order to perform an arithmetic coding on the pixel in accordance with the pixel, the less probable symbol size, the next less probable symbol, the next more probable symbol and the switch to accordingly produce a compressed data corresponding to the pixel and set parameters A and C, where the parameter A indicates an interval between zero and one and the parameter C indicates a bottom of the interval; and an output device, which is connected to the encoder in order to normalize the parameters A and C and output the compressed data corresponding to the pixel.