Data transmission apparatus, method and program, data...

Details Data transmission apparatus, method and program, data... Data transmission apparatus, method and program, data...

2005-08-02

2005-08-02

Tokar, Michael (Department: 2819)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C382S103000

Reexamination Certificate

active

06925117

ABSTRACT:
A data transmission apparatus and the like are provided which, in sending data of a large capacity such as still image data, can significantly reduce an amount of transmission data while suppressing deterioration of the data. The transmission apparatus of the present invention include: a differential data calculation section for, assuming that data to be a reference is reference data and data to be compared with the reference data is object data, comparing the reference data and the object data to calculate a difference between both the data as differential data; a differential data amount reduction section for reducing a transmission data amount of the differential data obtained by the differential data calculation section such that the differential data can be restored; and a data transmission section for sending the differential data with its data amount reduced by the differential data amount reduction section.

REFERENCES:
patent: 5416520 (1995-05-01), Kuzma
patent: 5485211 (1996-01-01), Kuzma
patent: 6075899 (2000-06-01), Yoshioka et al.
patent: 6661725 (2003-12-01), Roh
patent: 2001/0022862 (2001-09-01), Alm
U.S. Appl. No. 09/955,292, filed Sep. 19, 2001, Kamisuwa.

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