Method and apparatus for digital data compression

Surgery – Truss – Pad

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364417, A61B 504

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active

044495366

ABSTRACT:
Digital data compression method and means are disclosed which allow for transmission of digital data over a short time period and/or narrow bandwidth transmission line. Also a maximum amount of information may be stored on a movable recording medium using data compression method of this invention. Digital signals to be stored and/or transmitted first are compressed using a finite-impulse response digital compression filter which generates estimated signal values which are subtracted from actual signal values to provide a sequence of difference signals. The difference signals are encoded using a truncated Huffman type encoding method and means, and the encoded signals are transmitted to a remote receiver and/or are recorded. The receiver includes a decoder and digital reconstruction filter for exact reproduction of transmitted digital signals. The invention is well adapted for storage and/or transmission of three lead electrocardiogram (ECG) signals, recording and playback of music, and the like.

REFERENCES:
patent: 4098267 (1978-07-01), Stein et al.
Ruttimann et al., "IEEE Transactions on Biomedical Engineering," vol. BME-26, No. 11, Nov. 1979, pp. 613-623.
Bertrand et al., "Proceedings of the IEEE," vol. 65, No. 5, May 1977, pp. 714-721.

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