U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Arithmetic encoding and decoding of an information signal

Patent 6144320 Issued on November 7, 2000. Estimated Expiration Date: Icon_subject March 19, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Method and means for arithmetic coding utilizing a reduced number of operations
Patent #: 4286256
Issued on: 08/25/1981
Inventor: Langdon, Jr. ,   et al.

Arithmetic coding data compression/de-compression by selectively employed, diverse arithmetic coding encoders and decoders Patent #: 4891643
Issued on: 01/02/1990
Inventor: Mitchell, et al.

Inventor

Application

No. 273285 filed on 03/19/1999

US Classes:

341/50, DIGITAL CODE TO DIGITAL CODE CONVERTERS341/107To or from code based on probability

Examiners

Primary: Young, Brian
Assistant: Nguyen, Dinh Q.

Attorney, Agent or Firm

International Class

H03M 007/00

Foreign Application Priority Data

1998-03-23 EP

Abstract

In an arithmetic encoder and/or a corresponding arithmetic decoder, an A parameter, related to the size of a value interval, is truncated prior to multiplying the A parameter times the probability of a symbol, and the carry-over of the multiplication is controlled in the re-normalizing step in the encoder or decoder.

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