Method and apparatus for fax messaging in a selective call receiver system using multiple code-book data compression

Patent 5566001 Issued on October 15, 1996. Estimated Expiration Date:

July 27, 2014. 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.

Abstract Claims Description Full Text

Patent References

Communication system in facsimile
Patent #: 4897733
Issued on: 01/30/1990
Inventor: Sakaguchi, et al.

4920427

Radio fax transmission
Patent #: 4933770
Issued on: 06/12/1990
Inventor: DeSpain

Image processing system
Patent #: 5309526
Issued on: 05/03/1994
Inventor: Pappas, et al.

Method and apparatus for encoding a facsimile message Patent #: 5420692
Issued on: 05/30/1995
Inventor: Lin, et al.

Inventors

Assignee

Motorola, Inc.

Application

No. 286713 filed on 07/27/1994

US Classes:

358/426.02, Condition based selection or control of image coding technique or communication arrangement340/7.1, Paging to control diverse device340/7.53, Canned message (audible or visual)382/173, IMAGE SEGMENTATION382/232, IMAGE COMPRESSION OR CODING382/246Huffman or variable-length coding

Examiners

Primary: Coles, Sr., Edward L.
Assistant: Lee, Thomas C.

Attorney, Agent or Firm

Floam; D. Andrew

International Class

H04N 001/41

Abstract

A fax selective call receiver system (10) featuring compression of a fax message with an optimal one of a plurality of compression code-books (50). At least a portion (44) of a source document (26) is compressed with each of a plurality of code-books (50) and the smallest resulting data file is selected as the optimal compressed file. The compressed data file is transmitted to a selective call receiver (40) together with an index identifying the optimal code-book. The selective call receiver (40) stores each of the plurality of code-books and accesses the particular code-book for decompressing the data file on the basis of the received index. In an alternative embodiment, the fax message is divided into composing segments (SI1, SI2 and SI3) and each segment is compressed with each code-book to determine the optimal code-book for each segment.