Digital data transmission system

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry

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Details

358442, 358444, 358903, 36441313, 36441322, H04N 100

Patent

active

049491750

ABSTRACT:
An improved system for transmitting and receiving digital images includes means for storing portions of an incoming data packet in memory while the data packet is still being received from the data source, and extract the framing characters from the incoming data stream into separate buffers. This allows the next data packet to be requested very quickly due to the ability to perform the data validation testing immediately upon receiving the last character of the packet. This immediate validation feature allows the remaining data of the packet to be processed into memory concurrently with the reception of a new data packet from the data source. This "semi-concurrent" processing ability of the invention greatly reduces the time required to transfer the image data by reducing the time between the reception of an end-of-line character and the time the logic and control unit can request a new line, and by curtailing the delay between the data request by the invention, and the start of the data packet transmission by the data source.

REFERENCES:
patent: 4148070 (1979-04-01), Taylor
patent: 4751587 (1988-06-01), Asahina
patent: 4802008 (1989-01-01), Walling

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