Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1985-10-02
1988-02-23
Goldberg, E. A.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358105, 358261, H04N 712, H04N 718, H04N 1419
Patent
active
047274212
ABSTRACT:
A code conversion system for picture signals, e.g., television signals. In accordance with this system, an operation is made to select a coding parameter by using N scanning lines of the picture signal as a unit so as to encode the picture signal by using the coding parameter. When coding operations with respect to the picture signal carried out every N scanning lines are repeated in succession to provide the same coding result, an operation is made to encode a repetition number of the coding operations, thus providing a code conversion system suitable for a low transmission bit rate of picture signals. Particularly, this system is greatly practicable when applied to a predictive coding system.
REFERENCES:
patent: 4409623 (1983-10-01), Kobayashi et al.
patent: 4418409 (1983-11-01), Queen
patent: 4460923 (1984-07-01), Hirano et al.
patent: 4475127 (1984-10-01), Iinuma
"Digital Television Transmission Using Bandwidth Compression Techniques", by Hisashi Kaneko and Tatsuo Ishiguro, IEEE Communications Magazine, p. 14, (Jul. 1980).
Foster Patrick W.
Goldberg E. A.
NEC Corporation
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