Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1988-11-25
1990-04-03
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358136, 358345, H04N 704
Patent
active
049145150
ABSTRACT:
Finite audio and video signals are subjected to some digitalizing encoding format and converted into blocks of audio and video words, respectively. For transmission of these blocks via a compact disc, the words are arranged in packets. Each packet has a packet header and a data field. Such a data field comprises either only audio words or only video words. The packet heater indicates whether the associated data field comprises audio or video words. In order to transmit only changes in the picture in the case of, inter alia, quasi-stationary pictures, each block of video words is divided into a number of sub-blocks and an operational code is added to the beginning of each sub-block. This defines, inter alia, picture elements and the sub-block itself gives video words for these pictures elements.
REFERENCES:
patent: 4027331 (1977-05-01), Nicol
patent: 4150397 (1979-04-01), Russel
patent: 4633506 (1986-12-01), Kato
Matsui et al., "High Speed Transmission of Sequential Freeze-Pictures by Extracting Changed Areas", IEEE Transactions, vol. Com-29, No. 12, pp. 1977-1981, 12/81.
Eason Leroy
Groody James J.
Harvey David E.
Tamoshunas Algy
U.S. Philips Corporation
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