Method and apparatus for transmitting data isochronously at a ra

Details Method and apparatus for transmitting data isochronously at a ra Method and apparatus for transmitting data isochronously at a ra

1996-07-17

1997-02-25

Olms, Douglas W.

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

H04J 307

Patent

active

056065620

ABSTRACT:
A first station is connectable to a second station for transmitting a predetermined fixed amount of data to the second station over a predetermined time period to achieve a predetermined fixed data transmission rate. The predetermined time period consists of a plurality of constituent time periods. An amount of substantive data, which is less than the predetermined fixed amount of data, is transmitted from the first station to the second station in the predetermined time period by transmitting the substantive data during a portion of the constituent time periods and transmitting "null" data during the remainder of the constituent time periods. Thus, over the predetermined time period, the substantive data is transmitted at an effective rate that is less than the predetermined fixed data transmission rate. The null data may be transmitted interspersed with the substantive data, and the determination of how to intersperse the null data with the substantive data may be according to an interpolation algorithm, such as Bresenham's algorithm.

REFERENCES:
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Technical Manual -CCITT, The International Telegraph and Telephone Consultative Committee, Line Transmittion of Non-Telephone Signals, "Frame Structure For A 64 to 1920 kbits/s Channel In Audiovisual Teleservices," H.221, Geneva, 1990.
IBM Technical Disclosure Bulletin "Adaptation and Multiplexing Format for High Performance Scanning Function", vol. 35. No. 3, Aug. 1, 1992. pp. 166-168.

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